Luvfun TROND Bluetooth V4.2 Receiver Wireless 3.5mm Aux Adapter, AptX Low Latency, Volume Control & Smart Codec Indicator, for Wired Headphones or Speakers

Review of the following two items purchased together:Tx/Rx: TROND Bluetooth V4.1 Transmitter Receiver / Wireless 3.5mm Audio Adapter with aptX Low Latency & aptX for Both TX & RX, Dual Stream and Volume ControllerRx: TROND 3.5mm Bluetooth V4.2 Audio Receiver Adapter with AptX Low Latency & Volume Control, for Home Stereo, Wired Headphones & SpeakersBoth are 5 stars IMO. Here’s what I was looking for and what I found:Main objective: Use a BT receiver to allow me to use wired high quality headphones (Sennheiser HD650, HD598, HD555 mod to 595) with BT enabled devices (TV, computers, iPhone 7+, iPods and iPads) and secondary objective of using wired headphones with non-BT enabled legacy devices (iPod classic, older TVs)Why? Good quality BT enabled headphones are expensive and have a limited frequency range (Bose QC35 $349, and Sennheiser HD-1 Wireless $499, 28 ohm impedance, 16-22000 Hz) compared to higher quality headsets (Sennheiser HD650 300 ohm impedance, 10-41000Hz; HD598 50 ohm, 12-38,500 Hz, HD280 64 ohm, 8-25000 Hz). Even though BT has improved up to BT 4.2 and codecs for sound transmission have improved to decrease latency and transmit a broader range of frequencies, it is still cheaper to convert wired headset to BT capability at the inconvenience of managing a dangling cable. I don’t expect the BT transmission to have the same quality as a headphone wired directly to a receiver or iPhone/iPod/iPadWhy did I purchase both?a. Reviews of many bluetooth (BT) receivers (Rx) used to drive headphones reported lag between video and audio. I wanted the receiver, but if there was going to be lag, then I’d pair the Rx/Tx with the Rx to see if that helped. I looked for low latency drivers.b. For non-BT devices (old iPod classic, non BT TV, I needed a BT Tx, so a combo Rx/Tx made sense.What features were I looking for?a. Volume control on the Rx. Why? because the wired headphones don’t have volume control unless I put a volume control between them and the Rx. Samsung Series 6 600D and Series 7 700D UHDTVs with BT don’t provide volume control using the TV remote; therefore the receiving end of the BT Rx has to control the volume.b. Most up to date BT 4.1 or 4.2 so that it maintains backwards compatibility with other BT units (not all BT are the same — i.e. my iPhone 7+ can pair to a Jaybird Freedom, but my iWatch series 2 won’t pair with the Jaybird Freedom).My intended uses:1. Pair Bluetooth TV to Rx connected to headphone, if there is latency, then connect Rx/Tx to TV RCA outs and pair Rx/Tx to Rx connected to headphone2. Pair iPads/iPhone/iPod blue tooth to Rx/Tx in Rx mode or Rx connected to headphone3. Pair Rx/Tx to Rx connected to headphoneDESIGN.Both have the same small form factor, plastic box except the Rx has an on off sliding switch rather than just a single button that has to be held 3 seconds to turn it on. Rx/Tx no sliding on off switch, just a button that has to be held down 3 seconds.EASE OF CONNECTION:Charged both fully. Tx/Rx set to Tx and turned on, Rx turned on 1st time and they paired within 5-10 seconds. Tx/Rx goes to solid blue; Rx goes to LED off blinking blue every 10 seconds instead of solid blue to indicate connection. No I can connect any nonBT device (TV, older iPods, iPod Classic) via male to male 1/8” plug to the Tx/Rx set to Tx mode and headphone connected to Rx and I have a functioning BT system. I just wrap the headphone cords up with velcro and put it on one side of the headband … looks geeky but I’m using it for function, not looks.To set either unit to pair, just double tap the “power button” and they immediately blink red blue red blue until paired. Once paired, Tx/Rx light goes to solid blue, Rx blinks blue every 10 seconds. Even if a connection is active, the double tap “power button” breaks the connection and sets the units to pair mode. Pairing is quick.Pairing to Samsung 600D, 700D UHDTV is easy. Go to Menu Settings > Audio > Select Speaker > Bluetooth. The Trond unit will show up no screen, select pair and it’s done in 5 seconds. Volume control is on the Trond unit; Samsung remote cannot control volume from TV. NO LATENCY on both TVs to Rx/Tx or Rx. Very nice. Don’t need to implement the Rx/Tx —> Rx method. This gives me a BT Rx for each TV now.Caveat, iWatch series 2 cannot pair to either Trond Rx/Tx set to Rx mode or Trond Rx. But iWatch series 2 cannot pair to Jaybird Freedom BT earphone. iPhone 7+ pairs to Tronds and Jaybird Freedom BT and work without problems. This seems to be more of a problem with the iWatch than the Trond units.DROP OFFS and DISTANCE:Connection good to HDTV BT 30 feet away unobstructed. No drops offs of signal or loss of connection with iPhone in pants pocket and received on opposite side of my head indoors. Haven’t tested outdoors where BT can’t bounce off walls. Intermittent breakup when BT Rx separated from BT Tx by a floor (i.e. receiver on 1st floor, Tx in basement, but of course it gets better when I’m standing 1 floor immediately above the Tx in the basement).If paired to iPhone 7+ and I turn on the car to which the 7+ is paired, the Trond connection shuts off and the car and 7+ become paired to give priority to car-phone handsfree connection. Trond doesn’t have a speaker and can’t be used for answering calls (which is not what I got this for).SOUND QUALITY:No lag from Samsung UHDTV Series 6 and Series 7 using the TVs BT. No audio-video lag between TV and Trond Rx, iPad and Trond Rx playing movies on Amazon Prime and Youtube.Sound quality depends upon type of headphone connected to Rx, but the Rx and Rx/Tx can both drive a 300 ohm impedance Sennheiser HD650 without problem. (Avantree Quick Clip reportedly has a hiss and can’t drive anything more than 32 ohm from what I’ve seen on reviews on Amazon).The sound quality (frequency spread) is not as wide as wiring the HD650 directly to my iPod classic, but it’s almost as good (i.e. like listening to an MP3 at 320 kbps instead of a lossless MP4/M4A at up to 1444 kbps sampling). I use MP4 lossless music files as I can hear the difference in quality between 1444 kbps sampling MP4/WAV and MP3 320 kbps max. I am very satisfied with the BT performance from iPhone 7+ to Trond Rx to HD650, and iPod Classic to Trond Rx/Tx to Trond Rx to HD650. Even though reviews say an HD650 is best used with an external amp, I have been more than satisfied with the performance with an un-ampped HD650 driven by an iPod classic or iPhone 7+ lightning to 1/8” plug given the type of recordings I use (which are much better than the 128 kbps stuff found off of iTunes music store … the stuff that many are satisfied using less refined headsets and earbuds).Works just fine with the other HD598, HD 555 mod to HD 595, so it should work just fine with anything lesser. Even the slightly truncated sound of the Tx/Rx to HD650 is still better than any of the other headsets. Wired is always better than BT, but BT is getting close. Other specs:HD280 8-25000 Hz, 64 ohm impedanceHD555 12-38599 HzHD598 12-38500 Hz, 50 ohmHD650 10-39500 Hz, 300 ohmHD1 16-22000 Hz, 28 ohm; this is Sennheiser’s $499 BT headsetBose QC35 $349, QC2, QC3 — I can’t find specs on these, but the Trond’s drive my QC3 just fine. Haven’t tested QC2 and of course the QC35 doesn’t need this. In general, Bose headphones tend to muddy the mids and are thus more bass heavy than balanced headphones.Sennheiser HD700 8-44000 Hz, 150 ohm, $419Sennheiser HD800 19-44900 Hz, 300 ohm, $990I’d rather spend my money on an HD700 than on the $499 HD1, so the Trond BT are a workable solution for me. If they can drive the HD650, I’d anticipate it should do just as well with an HD700.Things I haven’t tested:I haven’t tried the Rx/Tx bind to two Rx to drive two headphones, but this is what would be needed to drive 2 headsets from one TV. I haven’t tested how week the signal would get from an Rx connected to a 1/8” splitter to drive two headsets.FINAL THOUGHTS:1. Trond Rx/Tx and Rx are both 5 star.2. BT pairing is easy, quick and simple.3. No lag between audio and video from Samsung UHDTV BT to either Trond unit.4. Trond Rx able to drive 300 ohm Senheisser HD650 without hiss5. Less cost than the Avantree Quick Clipper Pro and Priva III (which I considered prior to purchasing these). Reportedly the Clipper can’t drive anything >32ohm per specs.If you don’t need a BT Tx, then I’d just buy the $20 Trond BT Rx. If you want flexibility, then get the Trond BT Rx/Tx with volume control which are $37 as of 3/20/2017. Even though iPhone and iPod Classic can control the volume transmitted to the Rx, the Samsung TVs don’t; therefore, I wouldn't get the BT Rx/Tx without volume control or volume at the headset will be loud unless you put a volume control between the Rx and the headset plug.3/24/2017 Update:I liked these so much, I bought another pair of Tx/Rx and Rx. Amazon had a lightning deal on the Tx/Rx for around $25. Great deal.To get them to initially pair, make sure no other BT devices are on. I couldn't get them to pair initially when my BT Samsung UHDTV was on because the TV seems to automatically pair to devices like this. Once I turned off the TV, I could get the Rx/Tx to pair to the Rx. After that, pairing was quick as long as the two were in near contact with each other though other BT devices were on.One Tx/Rx paired to 2 of these Rx work just fine.Indoors, no signal drops as the signal bounce off the walls. Outside I get a few 0.5 s signal drops when bending over and moving around such that signal from Tx/Rx in my left pocket is blocked by my body with Rx attached to headphones. This is expected with BT outside.Update: 4/10/2017When using these with a sensitive, low impedence in ear monitor -- Shure PTH500/530, there is background noise when played at low levels; the Shure can play really loud at a lower volume setting than >50ohm impedance headphones (i.e. No low level noise using Sennheiser HD280 (64 ohm), HD 555/598 (50 ohm), HD 700 (150 ohm), and HD 650 (300 ohm).Paired to Samsung Series 6/7 UHDTVs as well has headphone output on a Yamaha RX-3060 receiver running a connected BluRay, I find no lag between audio and visual, even after putting the movie through various digital signal processes on the Yamaha.

Using a Oneplus 3 phone, I can get more than 30 ft. of range with this device plugged in from behind a cabinet door. My older Samsung G5 with older Bluetooth appears not to recognize the device at all with its modern chip inside, though. Without testing, the sound quality seems equivalent to a direct 3.5mm connection. The receiver has a bice build quality and packaging. I used a gold plated audio cable, which seems to keep the audio free of any distortion. It also gives off no sound while plugged in to an audio set, unlike a more expensive model from a different brand I used did. This uses the APTX-LL codec, which is the newer Bluetooth codec, but the higher fidelity APTX-HD is not widely in use yet, and requires a Bluetooth 5 device and receiver.Edit: I knocked a star off because about 1 out of every 5 times, it fails to connect to a device trying to connect with it. The device will say connected, and play as if it is, but nothing comes out of it. Initially, I thought this was a device issue, but it glitches like this on every phone or tablet I tried. I just have to reconnect, but clearly there's some kind of issue. Sound quality is good, so this is more a nuisance than a major problem.

This has provided excellent bluetooth support for my Bose QC25 headphones -- crisp sound, dead silent on quiet passages, and standard bluetooth range...about 20-30 feet. I see that some people have complained about hiss. Perhaps this is because of the impedance of the headphones used, or because of the particular device broadcasting to the TROND. Both of these possibilities are points of possible concern. All I can tell you is that with my Bose QC25 and old Motorola Razr Maxx pumping out the music, everything sounded great for me.The receiver is both smaller and lighter than I expected, both of which are plusses. Charge time was pretty quick, and I've been listening for the past 4 hours and the TROND is still going strong.For anyone who has the Bose QC25, the TROND combined with the SoundTrue cable makes a great combo:https://www.amazon.com/Conversion-Around-ear-Audio-Technica-Sennheiser-Headphones/dp/B01N0OA64P/ref=cm_cr_arp_d_product_top?ie=UTF8While this might not be as elegant as the QC35 with built-in bluetooth, it has several advantages. First, the removable standard AAA battery in the QC25 means that, unlike the built in rechargeable of the QC35 that will unavoidably degrade over time, the QC25 will always be able to perform as good as new. Second, when Bluetooth 5 becomes more prevalent, my guess is that TROND (or others) will come out with similar bluetooth 5 receivers, which will give the QC25 BETTER clarity than the QC35. For now, though, this TROND receiver seems to be excellent.

Zéro latence et belle dynamique audio pour cet adaptateur bluetooth. La différenciation sonore / séparation des canaux gauche et droite est très bonne.L'interrupteur à glissière pour le marche / arrêt est excellent : plus besoin de s'assurer à l’écouteur que le périphérique est éteint: cela se voit d'un simple coup d’œil.Je regrette cependant :- des basses un peu trop absentes malgré une plage de fréquence bien large (notamment sur les autres fréquences) ;- l'absence d'accroche (pince arrière) intégrée (ou par l'intermédiaire d'un clip optionnel à rajouter) l'empêche d'être tout terrain. En l'absence de poche, on ne sais pas trop quoi en faire : bien qu'il soit très léger il faut bien le coincer quelque part.- la non différenciation de boutons physiques pour les fonctions volumes (+/-) et sauts (AV/AR) comme elle existe sur d'autres modèles. Un impulsion (saut) ou un appui long (volume) déterminera l'action choisie. = > risque de loupé.Malgré ces légers griefs, le 5 étoiles est amplement mérité pour sa qualité de traitement audio, son niveau de prix, son autonomie et sa compacité. Les basses non surlignées seront plutôt un avantage dans le cas d'un rajout de la fonction bluetooth en entrée de chaîne HiFi (ou d'un PC) par ce boitier : la dynamique sera bien là avec justesse, les fréquences basses pourront être ensuite ajustées selon les goûts du mélomane par un égaliseur audio.

Very Fast Despatch. Nice little unit, a bit plasticky but functions well. Paired really easily with a variety of sources. Perfectly useable line-of sight range of about 10m, deteriorates as objects are in the way - as expected. Slight hiss when no signal present, barely any decoding delay so good for video but not fast enough for IEMs. Comes with several useful connectors. Nice balanced sound for the money, recommended. I bought this together with "TROND Bluetooth V4.1 Transmitter Receiver / Wireless 3.5mm Audio Adapter, Featuring aptX Low Latency for Both TX & RX, Dual Stream and Volume Controller". Can now watch TV with wired headphones but no physical connection between headphone and TV.

Habe ihn mir gekauft um meinen inear Kopfhörer daran anzuschließen statt direkt am Handy, da die Kopfhörerbuchse sonst immer ausleiert und es dadurch zu Abbrüchen in der Wiedergabe kommt (Handy denkt der Stecker wurde gezogen und stoppt die Wiedergabe). Zusätzlich bin ich durch den Adapter nun freier im Handling des Handys geworden, da kein störendes Kabel mehr dran hängt, gerade wenn man das Handy für Online Tickets, zum fotografieren usw. nutzen will oder es aufladen muss ganz angenehm. Es gibt einen vernünftigen Schiebeschalter zum an/ausschalten sowie 2 Tasten für vor/zurück bzw. lauter/leiser (Doppelbelegung über Dauer des Tastendrucks) und einen weiteren für Play/Pause, die Lautstärkeregelung ist auch die gleiche wie auf dem Handy (einer meiner Bluetooth Lautsprecher hat das leider nicht, da muss man immer beides voll aufdrehen für volle Leistung). Pairing mit meinem Sony Z3 Compact war ganz einfach und auch die aptx Fähigkeit wurde direkt erkannt und aktiviert. Gewicht und Größe sind erfreulicherweise geringer als erwartet, etwa Streichholzschachtel-Größe nur flacher, sodass man es in jede noch so kleine Tasche stecken kann ohne zu stören. Die Reichweite des Bluetooth Signals ist wie zu erwarten innerhalb eines Raumes voll da, in einem anderen Raum könnte es schon Schwierigkeiten geben, da müsste man schon ein anderes Funkprotokoll nehmen, ist für meine Zwecke aber überhaupt kein Problem. Die Soundqualität gibt keinerlei Anlass zur Kritik und die mögliche Lautstärke ist sogar ein ganzes Stück höher als bei Direktanschluss an meinen Sony Geräten. Im Lieferumfang ist so ziemlich alles was man irgendwie brauchen könnte, USB-microUSB Ladekabel, 3,5mm-3,5mm Doppelstecker, alternativ auch ein 3,5mm Stecker-3,5mm Stecker Verbindungskabel und zusätzlich noch ein Adapterkabel von Cinch/RCA Steckern auf 3,5mm-Buchse. Es ist eine kleine Status-Led verbaut um den Ladezustand und Betrieb zu signalisieren, im Akku-Betrieb blinkt die allerdings nur alle paar Sekunden mal kurz leicht auf, sollte also definitiv nicht stören.

Después de indagar sobre diversos tipos de barras de sonido para conectar a un televisor Samsung serie 6 y que no me acababan de convencer, pensé que sería una alternativa poderlo conectar a un equipo estéreo que tengo desde hace más de 20 años. Este pequeño receptor ha permitido realizar la conexión a través del Bluetooth del televisor con muy buenos resultados. El receptor es fácil de configurar e incorpora control de volumen, ya que el mando del TV permanece inhabilitado cuando está activada la conexión Bluetooth. El receptor también se puede emparejar hasta con dos dispositivos emisores Bluetooth. Se suministra con los cables de audio necesarios y el cable USB para su carga desde la red / ordenador. Producto totalmente recomendable a un precio interesante.

Ho preso sia il trasmettitore che il ricevitore TROND per collegare le mie cuffie di riferimento che non sono bluetooth.Entrambe i prodotti si presentano leggerissimi e davvero piccoli. Il guscio è in plastica, con questi rispettivi colori: Il ricevitore è in argento, mentre il trasmettitore (che ha anche la funzione di ricevitore selezionabile da una apposita levetta) è nero con rivestimento gommoso morbido al tatto.Dopo averli tenuti entrambi sotto carica per 4 ore circa, ho collegato il tutto alla mia TV e la connessione tra i due dispositivi è stata velocissima. Non ho notato latenze guardando le immagini in TV, tutto funziona perfettamente anche se mi sposto in un'altra stanza. La qualità audio è buona, e la trasmissione risulta priva di interferenze.Ho provato i prodotti anche come Ear Monitor, suonando una tastiera e collegando il trasmettitore all'uscita cuffie del mixer e devo dire che malgrado questi prodotti non nascano per questi utilizzi, si riesce tranquillamente a suonare. Certo, la latenza non è pari a zero, ma certamente tollerabile.Per il momento posso ritenermi soddisfatto dell'acquisto.Amazon impeccabile come sempre.