B-Tech BT928 Headphone Amplifier

[honglong]

Hi,

I have just bought one of these and was wondering if its any good and how well it compares with other headphone amps?

Also, i have looked on various websites and theres lots of mods you can do to it.

http://www.rock-grotto.co.uk/B-tech.htm

Has anyone modded this? How well does it sound now? Compare to other headphone amps?

Thanks

[alexs2]

Did you read further down the review and the mods.....for the price,a real bargain,and with all the mods suggested...on a par with the Creek OBH-11.

Which would still suggest a bargain in real terms,but not a stunning amp in overall terms.
The Creek,in my view,is good,but not up to either a decent X-Cans(with NOS tubes)or other amps above it's price range.....just a thought.

[pbirkett]

I had one. Its fine for cheap headphones, and as alexs2 says its probably as good as an OBH-11 if modded - but ultimately thats not saying all that much. If you ever get some reasonable quality headphones, the sort that cost more than about £50 then I'd say you will want to upgrade if you wanted to extract the most from your cans.

[honglong]

does anyone know where i can get this modded? I know there are a few people on some of the forums which have this modded.

Thanks in advance

pinkfloyd from headfi forums has experience of modding this

[deanym]

Just gave a B-tech hp amp, mentioned above, to another forum member to test whether one would benefit him or not. No feedback yet. I thought it was perfect for playing a zoom guitar pedal through and not upsetting the neighbours!

My combination of x-cans v2 (with amperex tubes - awesome), hd600 (with Cardas cable upgrade) , and MF x-ray connected with VdH the first sounds amazing - can cope with any taste thrown at it.

However would love to try an earmax pro with grado rs-1. Has anyone had any experience of these?

Ive got one with upgraded caps and resistors - does sound pretty good much better than the stock one

also remove the tone control

[honglong]

Smiley Man
did you upgrade the amp yourself?

I am in the process of upgrading the headphone amp, should be done by 7pm (i am doing it in between work)

[honglong]

I have upgraded the Amp.

I tried it last night and it sounds awesome. I used a mixture of Panasonic FC and ELNA capacitors and metal film resisters and a new op amp

hi

no i bought it pre modded second hand, i would have done it myself but i saw the modded one for sale cheap so snapped it up

[honglong]

Smiley Man:

What do you think to the amp (modded)? What headphones do you use? Have you compared it to anything? How does it compare?

Thanks

[G a f f e r]

went to maplin on-line....they don't seem to stock it.

Anyone know where i can get one from?

thanx

[honglong]

Are you after the B-Tech headphone amp?

Best place i found is eBay.

Thats where i bought mine from and RS for the extra parts

Originally Posted by honglong

Smiley Man:

What do you think to the amp (modded)? What headphones do you use? Have you compared it to anything? How does it compare?

Thanks

hello :D

the only amp i compared it to was the unmodded one and my iriver, its much better than the stock amp, much clearer sound and erverything sounds crsiper and less muffly. its a lot better than the iriver as well

i havent tried a top end can amp although i might have to invest :D

[emperor]

i know this is old, and i bought one of these headphone Amps, and i did all the mods, panasonic caps, metal film resistors, B brown opamp. And i wasnt impressed for a year............until. i finally took away the Tone pot.

Why i didnt do this a while ago, i dont know, i always thought that it sounded kind of Muffly toned, couldnt understand the fuss. but removing the pot was a revelation, sounds fantastic. I feel no need to get an expensive Headphone Amp now, and it works very well, with my Sennheiser HD580's

I highly reccomend to do the mods and remove the tone pot