XPA-1 into 2ohms loads | The Emotiva Lounge

wizardofoz
Protean Force

Chill...nobody gets out alive...even you!

Posts: 3,028

XPA-1 into 2ohms loads Apr 21, 2013 3:08:57 GMT -5

Quote

Post by wizardofoz on Apr 21, 2013 3:08:57 GMT -5

Anyone gone down this route with XPA-1's?

I recall Lonnie himself mentioned some time back that the XPA-1 would not complain about 2 ohm loads ... but the search in this board is so pathetic I cant find anything.

I have a need to drive 2 x 4 ohm drivers (bass only) Woofer - SEAS L26RO4Y, D1004-04 in parallel...I have tried series and I am told that this would result in the combination being -6db down. The are in an open baffle (Linkwitz LX521)

I doubt that I would be pushing them that hard...the mids are being driven by UPA-1's and the tweeters share a UPA-2 for L/R

Here is the spec graph for the woofer. Looking at the graph I would say its likely to be closer to 2.5 ohms as the dip is around 5ohms.

Specifications

www.seas.no/index.php?option=com_content&view=article&id=305:d1004-04-l26ro4y&catid=49:design-by-seas&Itemid=266

Last Edit: Apr 21, 2013 4:44:44 GMT -5 by wizardofoz

My 2nd XMC-1 is SOLD. Still have one

XMC-2 is struggling along

I have a pile of stuff that pushes out squiggly waveforms from smaller squiggly waveforms that sometimes come from 1's and 0's.

It's wonderful to behold as long as you don't let the magic smoke out.

For the most part it just all works...when it doesn't then it's time to rub a few brain cells together and soon enough it's all good to go again.

Life is short! Enjoy the music while it plays

wizardofoz
Protean Force

Chill...nobody gets out alive...even you!

Posts: 3,028

XPA-1 into 2ohms loads Apr 21, 2013 5:18:55 GMT -5

Quote

Post by wizardofoz on Apr 21, 2013 5:18:55 GMT -5

Just found this....from a few years back. Thanks google...not proboards

emotivalounge.proboards.com/index.cgi?action=display&board=ampfaqs&thread=15571&page=1

My 2nd XMC-1 is SOLD. Still have one

XMC-2 is struggling along

I have a pile of stuff that pushes out squiggly waveforms from smaller squiggly waveforms that sometimes come from 1's and 0's.

It's wonderful to behold as long as you don't let the magic smoke out.

For the most part it just all works...when it doesn't then it's time to rub a few brain cells together and soon enough it's all good to go again.

Life is short! Enjoy the music while it plays

garbulky
Lounge Lizard

Posts: 15,910

XPA-1 into 2ohms loads Apr 21, 2013 6:19:19 GMT -5

Quote

Post by garbulky on Apr 21, 2013 6:19:19 GMT -5

Like I said impednace dips would probably force the resulting 2 ohm load even lower. Not even the 220V will help you then

Transport: Sony UBP-X700 UHD-Blu ray player spdif
PC using Musiland Digital Times WASAPI via BNC connection -
DAC: DC-1->XLR XPA-1 , RCA->Basx A-100
CD: Denon DCD 600 PCM 61 DAC. RCA
Amp: XPA-1 gen 2 using XLR connections.
Speakers: Axiom Audio m80 V3, Sennheisser HD700 headphones.
two pairs 12 guage each bi-wire speaker cables per monoblock
Headphone amp: Basx A-100 (INCREDIBLE VALUE!!)

Other equipment: Sennheiser HD700. LG65ef9500

wizardofoz
Protean Force

Chill...nobody gets out alive...even you!

Posts: 3,028

XPA-1 into 2ohms loads Apr 21, 2013 7:38:08 GMT -5

Quote

Post by wizardofoz on Apr 21, 2013 7:38:08 GMT -5

The impeadance dip is 5 ohms on the 'nominal' 4 ohms based on the graph...ill ask the seas guys to comment on the linkwitz forum, but based on the the dip would be around 2.5 ohms in parallel.

So far so good, not going into protect mode and heat seems to be fine, but I'm watching the F1 race now so not playing anything. Maybe a bit later tonight I'll be playing some more.

Sound mighty good now tho!

Last Edit: Apr 21, 2013 8:28:46 GMT -5 by wizardofoz

My 2nd XMC-1 is SOLD. Still have one

XMC-2 is struggling along

I have a pile of stuff that pushes out squiggly waveforms from smaller squiggly waveforms that sometimes come from 1's and 0's.

It's wonderful to behold as long as you don't let the magic smoke out.

For the most part it just all works...when it doesn't then it's time to rub a few brain cells together and soon enough it's all good to go again.

Life is short! Enjoy the music while it plays

ocezam
Protean Force

Movies are entertainment. Music is spiritual.

Posts: 1,760

XPA-1 into 2ohms loads Apr 21, 2013 8:11:22 GMT -5

Quote

Post by ocezam on Apr 21, 2013 8:11:22 GMT -5

Apr 21, 2013 3:08:57 GMT -5 wizardofoz said:

the search in this board is so pathetic I cant find anything.

The search on this board is so pathetic you're better off getting off the board and searching thru Google. Many times Google will find the hits and reference you back to this forum.

...

"The ear is not a microphone, the brain is not a tape recorder, and measurements are limited in describing subjective quality." - Nelson Pass

2 Channel:
DC-1, Actively bi-amped custom built planers with Maker Audio G9 Mono Block amps (2 ea), and XPR-1 (2ea) crossed over at 650hz 12 db Linkwitz/Riley Electronic Crossover

Theater:
A whole bunch of junk that I haven't been interested in in years. Movies suck....

garbulky
Lounge Lizard

Posts: 15,910

XPA-1 into 2ohms loads Apr 21, 2013 9:56:35 GMT -5

Quote

Post by garbulky on Apr 21, 2013 9:56:35 GMT -5

Hey wizard....how are those linkwitz treating ya?! We fully expect a review with lots of pictures, video and sound!! ;D

Transport: Sony UBP-X700 UHD-Blu ray player spdif
PC using Musiland Digital Times WASAPI via BNC connection -
DAC: DC-1->XLR XPA-1 , RCA->Basx A-100
CD: Denon DCD 600 PCM 61 DAC. RCA
Amp: XPA-1 gen 2 using XLR connections.
Speakers: Axiom Audio m80 V3, Sennheisser HD700 headphones.
two pairs 12 guage each bi-wire speaker cables per monoblock
Headphone amp: Basx A-100 (INCREDIBLE VALUE!!)

Other equipment: Sennheiser HD700. LG65ef9500