Bridging Hlly T-AMP90

d3ll · 29th January 2010, 01:41 PM

Hi all,

Ive just gotten hold of a Hlly T-AMP90 and was wondering if anyone had tried bridging one?

Ive emailed Hlly about it aswel, as they advertise it can be done, just thought id ask if anyone had done it already?

I tried searching but didnt find much.

Thanks for any help

d3ll · 30th January 2010, 01:48 PM

Ive downloaded the manual now which has the schematic in, I can see im going to have to do quite a bit more research before I attempt this

Saturnus · 30th January 2010, 02:24 PM

No, they can't be bridged. They can be paralled though to drive lower impedances.

d3ll · 30th January 2010, 02:31 PM

Hmm, it says in the manual "Can be modified to operated in bridged mode and get more output power" is that wrong?

wwenze · 30th January 2010, 02:40 PM

The TA2022 IC can be bridged, and a Chinese Poppulse T-amp similar to the Hlly T-amp 90 supports bridged mode if you use balanced input via XLR.

Saturnus · 30th January 2010, 04:04 PM

Quote:

Originally Posted by d3ll

Hmm, it says in the manual "Can be modified to operated in bridged mode and get more output power" is that wrong?

No, that's correct. The chip itself can be bridged but the hlly T90 can't out of the box.

d3ll · 30th January 2010, 04:24 PM

Ah i see, thanks for the replies guys.

I think I may have messed up a bit anyway, ive seen a couple of suggestions now that once bridged it can only power an 8ohm load, not 4ohm..is that right?

Its a shame its not 2ohm stable, im currently using one channel to power a DVC 2ohm sub.

Saturnus · 30th January 2010, 06:19 PM

Well, it's 2 Ohms stable if you parallel the outputs (and not bridge them), so you could just get 2, parallel both and drive one VC with each.

hllyelec · 1st February 2010, 01:24 PM

Yes, TAMP-90 support bridged out!
User can download the manual here:
www.hllyelectronics.com/download/T90/BTL.doc

Thanks

d3ll · 1st February 2010, 02:44 PM

Thanks for that hllyelec, that wasnt in the file I downloaded originally, looks like a pretty simple mod

Unfortunately I probably wont be doing it now if it can only handle 8ohm bridged, maybe ill get a 2nd at some point as Saturnus says, for the time being ill just use the one channel.

Thanks for all the input guys!

29th January 2010, 01:41 PM	#1
d3ll diyAudio Member Join Date: Dec 2009	Bridging Hlly T-AMP90 Hi all, Ive just gotten hold of a Hlly T-AMP90 and was wondering if anyone had tried bridging one? Ive emailed Hlly about it aswel, as they advertise it can be done, just thought id ask if anyone had done it already? I tried searching but didnt find much. Thanks for any help

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30th January 2010, 01:48 PM	#2
d3ll diyAudio Member Join Date: Dec 2009	Ive downloaded the manual now which has the schematic in, I can see im going to have to do quite a bit more research before I attempt this

30th January 2010, 02:24 PM	#3
Saturnus diyAudio Member Join Date: Jun 2005 Location: Copenhagen, Denmark	No, they can't be bridged. They can be paralled though to drive lower impedances.

30th January 2010, 02:31 PM	#4
d3ll diyAudio Member Join Date: Dec 2009	Hmm, it says in the manual "Can be modified to operated in bridged mode and get more output power" is that wrong?

30th January 2010, 02:40 PM	#5
wwenze diyAudio Member Join Date: Mar 2008	The TA2022 IC can be bridged, and a Chinese Poppulse T-amp similar to the Hlly T-amp 90 supports bridged mode if you use balanced input via XLR.

30th January 2010, 04:24 PM	#7
d3ll diyAudio Member Join Date: Dec 2009	Ah i see, thanks for the replies guys. I think I may have messed up a bit anyway, ive seen a couple of suggestions now that once bridged it can only power an 8ohm load, not 4ohm..is that right? Its a shame its not 2ohm stable, im currently using one channel to power a DVC 2ohm sub.

30th January 2010, 06:19 PM	#8
Saturnus diyAudio Member Join Date: Jun 2005 Location: Copenhagen, Denmark	Well, it's 2 Ohms stable if you parallel the outputs (and not bridge them), so you could just get 2, parallel both and drive one VC with each.

1st February 2010, 01:24 PM	#9
hllyelec diyAudio Member Join Date: Aug 2008	Yes, TAMP-90 support bridged out! User can download the manual here: www.hllyelectronics.com/download/T90/BTL.doc Thanks

1st February 2010, 02:44 PM	#10
d3ll diyAudio Member Join Date: Dec 2009	Thanks for that hllyelec, that wasnt in the file I downloaded originally, looks like a pretty simple mod Unfortunately I probably wont be doing it now if it can only handle 8ohm bridged, maybe ill get a 2nd at some point as Saturnus says, for the time being ill just use the one channel. Thanks for all the input guys!

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