- Headphone Preamp with Volume & Tone Control
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Product details
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Product Description
The Btech BT928 headphone amplifier is ideal for frequent headphone listeners or those without a headphone socket on their amp.Built exclusively for amplifying headphones, the components in the BT928 are higher quality than typical built-in headphones amps, meaning that the sound quality is more detailed and dynamic than running your headphones from your existing amp.In addition to the volume control, the BT928 also features a tone control for precise adjustment of the sound. Twin jacks of 3.5mm and quarter inch size allow for the connection of almost any headphone, without the need for an adaptor socket.To wire up the B-tech BT928 simply run a phono lead from your amplifier's pre-amp out or recording loop and connect it to the headphone amp's, gold-plated, phono input. For a good value, decent sounding headphone amp', the Btech BT928 makes a perfect choice.
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Customer Reviews
Most Helpful Customer Reviews
3 of 3 people found the following review helpful
I like this little unit although it does have flaws. I bought this unit based on price and the fact that it is mains powered. Unlike other reviewer I had no problems with the 3 pin adapter. I totally agree that the tone adjustment is useless, however as all I was looking for was volume increase its not a problem. My TV was incapable of driving my new Shure 440 headphones. When coupled with this little unit they sound fab!
2 of 2 people found the following review helpful
First point - the amp comes with a two-pin euro mains connector and this wouldn't fit into the supplied adaptor. One e-mail to the suppliers and another adapter was quickly sent - good customer service.
I currently have a small-screen TV in the study. Sound was poor and so I've added Logitech LS11 speakers, connected via a headphone jack to the TV. Sound quality is now much better but I still needed to brighten the sound if possible and also to connect headphones at the same time. I bought this amp so that I can adjust the tone and don't need to constantly connect/disconnect the headphones.
Two points - no input or output phono cables are supplied and the output from the phono cable by-passes the controls on the amp, meaning that sound from this output cannot be adjusted from the amp. The controls only affect the headphone sockets - probably as intended.
I had already purchased a Belkin headphone splitter cable (good quality) and so I connected the TV to the amp via a jack to phono lead, disconnected the phono output lead from the amp and connected the Belkin cable to the headphone socket, happily driving both the speakers and the headphones.
On the amp, the volume control controls both the speaker and headphone sound volume but the tone control doesn't seem to be very effective. At its Max setting, the sound is no brighter than when speakers or headphones are connected directly to the TV. Turning the tone control anti-clockwise very soon causes the sound to become muddy and unclear.
Unfortunately the suppliers do not provide information on the frequencies affected by the tone controls.
Summary - good for controlling output volumes but not the tone.
Addition - Wrote to Conrad over a week ago to find out the frequencies affected by the tone control - no response. I therefore query my initial positive comment about customer service.
I currently have a small-screen TV in the study. Sound was poor and so I've added Logitech LS11 speakers, connected via a headphone jack to the TV. Sound quality is now much better but I still needed to brighten the sound if possible and also to connect headphones at the same time. I bought this amp so that I can adjust the tone and don't need to constantly connect/disconnect the headphones.
Two points - no input or output phono cables are supplied and the output from the phono cable by-passes the controls on the amp, meaning that sound from this output cannot be adjusted from the amp. The controls only affect the headphone sockets - probably as intended.
I had already purchased a Belkin headphone splitter cable (good quality) and so I connected the TV to the amp via a jack to phono lead, disconnected the phono output lead from the amp and connected the Belkin cable to the headphone socket, happily driving both the speakers and the headphones.
On the amp, the volume control controls both the speaker and headphone sound volume but the tone control doesn't seem to be very effective. At its Max setting, the sound is no brighter than when speakers or headphones are connected directly to the TV. Turning the tone control anti-clockwise very soon causes the sound to become muddy and unclear.
Unfortunately the suppliers do not provide information on the frequencies affected by the tone controls.
Summary - good for controlling output volumes but not the tone.
Addition - Wrote to Conrad over a week ago to find out the frequencies affected by the tone control - no response. I therefore query my initial positive comment about customer service.
I got 2 of these - they are a bargain, but they are MUCH better with ONE simple modification.
If you look on the internet there a couple of forums which tell how to modify the BT928 unit - it is well worth REMOVING the tome control by just desoldering it from the circuit board. The tone control is pretty useless - it's just a treble cut. I have removed the tone pot off both my units and it makes a substantial difference to the sound - worth the careful effort. I haven't bothered with any other modifications as I'm quite happy with the sound after removal of the tone control from the circuit board.
Worth the money and the little effort of modifying it (if you want to be bothered ).
If you look on the internet there a couple of forums which tell how to modify the BT928 unit - it is well worth REMOVING the tome control by just desoldering it from the circuit board. The tone control is pretty useless - it's just a treble cut. I have removed the tone pot off both my units and it makes a substantial difference to the sound - worth the careful effort. I haven't bothered with any other modifications as I'm quite happy with the sound after removal of the tone control from the circuit board.
Worth the money and the little effort of modifying it (if you want to be bothered ).
Listmania!
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