Topic: Any Ice module (class D) amp users?

[mikeer2002ph]

Jus received my 125asx2 icepower modules, will make them monos so need ko BTL modules either kit or circuitry to build please, any suggestions welcome for a locally acquired components. Matagal kasi ngayon dating ng mga orders galing abroad. TIA

Lagyan natin pics.

actually each of the B&O IcePower 125ASX2 module is already BTL ready, all you need to do is wire them for it.

From the factory its wired for stereo, but can easily be converted to mono BTL through a simple rewiring on each of the modules - no exotic parts to use or no other kits to add on.

this PDF from IcePower should help

http://www.icepower.bang-olufsen.com/files/solutions/icepower125asx2_datasheet_1_1_class_d_amplifier.pdf

[romymartinez]

;Hypex NCore kit group buy?

[ndotcom]

actually each of the B&O IcePower 125ASX2 module is already BTL ready, all you need to do is wire them for it.

From the factory its wired for stereo, but can easily be converted to mono BTL through a simple rewiring on each of the modules - no exotic parts to use or no other kits to add on.

this PDF from IcePower should help

http://www.icepower.bang-olufsen.com/files/solutions/icepower125asx2_datasheet_1_1_class_d_amplifier.pdf

Thanks for the pdf link, already have those and that of ghent @ diyaudio instructions, you still need a phase inverter in front of one of the inputs as can be seen in page 23 of the datasheet. I'll try unbalanced(rca) to a balance(xlr) converter circuits for this purpose. DRV134 is good discreet and just add some components, but dual opamps opa2134, ne5532 and the likes would do also but of more components. Problema lang ala ako alam na meron opaamps na yan locally except 5532 sa deeco..

[markcrenz]

actually each of the B&O IcePower 125ASX2 module is already BTL ready, all you need to do is wire them for it.

From the factory its wired for stereo, but can easily be converted to mono BTL through a simple rewiring on each of the modules - no exotic parts to use or no other kits to add on.

this PDF from IcePower should help

http://www.icepower.bang-olufsen.com/files/solutions/icepower125asx2_datasheet_1_1_class_d_amplifier.pdf

ndotcom is right, it's not just a simple rewire (you probably missed the small triangle on page 23  ), you have to feed an inverted signal to one of the inputs and pull the BTL sync low for a BTL output. you then connect the speaker positive to the non-inverting amp output and speaker negative to the inverting amp output. same procedure can actually be done on ANY stereo amplifier. Of course with other amps there will be no sync pin to pull low, but it will work just as well.

[ATJr.]

reminds me of Crown power amp, two btl amps were bridged way back in the 90's i think...

[mikeer2002ph]

I reviewed the schematics again, yep I missed that small triangle with the (-) invert sign.

Anyway, the DRV134 is the best bet as it may be a simpler circuit to incorporate.

Have you tried alexan in binondo (elcano st if they're still there) or megamall (level 5 i think)?

[R]

Hmm, this is also arousing my interest. Looks like I'll do a bit more reading of Class D operation but design nowadays are competitive with their Class A/B counterparts with the efficiency to boot.

[Nelson de Leon]

Hmm, this is also arousing my interest. Looks like I'll do a bit more reading of Class D operation but design nowadays are competitive with their Class A/B counterparts with the efficiency to boot.

And more listening too!

[mikeer2002ph]

Hmm, this is also arousing my interest.

Looks like I'll do a bit more reading of Class D operation but design nowadays are competitive with their Class A/B counterparts with the efficiency to boot.

John,

Class D amps have already been around for quite some time, mostly used in the automobile/portable audio industry.

Power efficiency and ultra compact design are some of its hallmarks.

For the home audio front though, there has been a silent taboo to use these amps for full range because of "claims" from purists (read: traditional) that its sound is not 'refined' enough as compared to its Class A or Class AB peers, hence was mostly used for subwoofers with limited frequency range (think: BASH and SLEDGE)

Bang and Olufsen (with Sanyo as its chipmaker) in 2002 changed the Class D amp's audio refinement image overnight.

Keyword - ICEPower

Now a plethora of high end / boutique amp manufacturers are cashing in on this technology of B&O.

Let's name names:

For Home Audio

Rotel (AV Receivers, Distribution/Multichannel Amps)
Jeff Rowland
Bel Canto
Bang and Olufsen (for their speaker line)
Bowers and Wilkins (for their active speaker systems)
Martin Logan
PS Audio


For Car Audio

Pioneer
Alpine
Fujitsu-Ten
Stock audio of Audi, Aston Martin, Mercedes-Benz

For the mobile phone / phablet (phone+tablet) / portable (Notebook) market

Samsung
Asus

So yeah, Class D is a long way from home darlin!

[ninjababez®]

may receivers ba na gumagamit nito?

[markcrenz]

may receivers ba na gumagamit nito?

some older pioneer elites (3 years ago?) have used ice amps. not sure sa newer models or other brands.

meron ako technics stereo integrated amp class D na. 

a year or two ago some japanese guy from onkyo said the receivers would be very expensive if they had class d amps. but i'm pretty sure the prices will soon be competitive na rin. parang lcd tv rin yan or like most tech products, sobrang mahal dati pero ngayon mura na.

[ndotcom]

I reviewed the schematics again, yep I missed that small triangle with the (-) invert sign.

Anyway, the DRV134 is the best bet as it may be a simpler circuit to incorporate.

Have you tried alexan in binondo (elcano st if they're still there) or megamall (level 5 i think)?

Busy pa rin sa night job ko kaya di magforward mga DIY projects ko. Di talaga ko makahanap ng DRV134, found also that ito yung gamit ni Ghent sa diyaudio sa offerring niya using 125asx2 monos but price is steep for me @50US$/pc. Opted the ebay way kahit matagal dating dito sa amin.

Anyways, paint job nalang kulang sa case ko and I`ll be testing the modules this week paired with a Pass B1 clones(ebay).

;Hypex NCore kit group buy?

Hypex has also been arround at diyaudio for sometime now and read maganda reviews dun, plus mas madali makakuha ng modules ata neto. Try mo sir para compare notes na rin..

[ATJr.]

meron akong drv134...

[ndotcom]

meron akong drv134...

Ayun pala, sige sir Tony pag sa sunod na pagpunta ko sa inyo. Sana may 2 para sakto na. Tawag or text nalang ako, salamat.

[ATJr.]

meron kang board? pm mo rin si gynco, meron syan binebentang board na unbalanced to balanced, XLR output, pwede gamitin yon na pang bridge....mura lang...tanggalin mo yung xlr at lagyan ng +-15volt supply game na...
http://www.pinoydvd.com/index.php/topic,156238.msg1818685.html#msg1818685

[mikeer2002ph]

may receivers ba na gumagamit nito?

Rotel uses them in the RSX series AV Receivers, so goes with their RCX stereo receiver+CD player all in one unit.

Also found on some Pioneer Elite variants, some of which are competing with other (Pioneer in-house designed) class D receiver models.

As for class D being more expensive, I think its a matter of economies of scale - like way back when Plasma or LCD screens were costing enough to buy a house, now they can be had for less than 3 months salary because there is more supply and the technology has matured enough to be be very cost efficient to mass produce

[ndotcom]

meron kang board? pm mo rin si gynco, meron syan binebentang board na unbalanced to balanced, XLR output, pwede gamitin yon na pang bridge....mura lang...tanggalin mo yung xlr at lagyan ng +-15volt supply game na...
http://www.pinoydvd.com/index.php/topic,156238.msg1818685.html#msg1818685

Yes sir ka pm ko na siya before kaso madalang magonline dito, alam ko nga nakauwi siya last week kung natuloy siya, ganda rin sana nga try kasi maliit lang footprint ng PCB niya. Gusto ko sana try kahit tig isa pair niya, isa sa amp isa sa preamp.

[R]

Actually, in car audio Class D is like undergoing a renaissance. This is mainly because in a car environment, efficiency is king. Imagine the load of a tube amplifier will have on your car when it idles at 20A (Civics nowadays just have 70-80A stock alternators).

My eyebrow raised when Alpine first released their PDX series of full-range Class D with B&O's ICEPower design topologies, however those were still faulty thanks to problems reporting rampant noise issues, of course being the behemoth they are, they later on redesigned it to address the issues. Funny thing here is that the redesign weren't using ICEPower anymore.. I wonder what happened there.

Arguably leading the Class D technology in car audio would be JL Audio's HD line of amplifiers. Incredibly small, incredible power (150Wx4) packed in a small chassis I can throw below the passenger chair. Technical specifications are great too with a wtf-high switching frequency of 600khz (ICEPower modules are around 400-500khz I believe). No idea why they jacked up the switching frequency that high, I believe 5x the highest frequency spec'ed is good enough so that our ear won't pick up the switching speed.

Me? Bah, I just want an 8-channel ICEPower amplifier fitted with in-car-use DC power supplies With my current four amplifiers doing a 1500W of "maximum" A/B power at 4 ohms, it's pretty much jacking up my Shell station bills (I nominally just use >400W though) Hahahaha..

[ndotcom]

My BLUE ICE completed at last.....

The insides...



The backside....



Plug and play....

[Nelson de Leon]

Congrats! And nice housing. Malakas ba? Very tight bordering lean na?

[Weng!]

ganda. lalo na ang diy case

[Tsnad]

boss ilan watts yan....

[ndotcom]

Congrats! And nice housing. Malakas ba? Very tight bordering lean na?

Thanks sir, di ko pa mahanap ano klase ng tunog nya mix and match muna ko cables at preamp. Sa 7 hours na pakinig ko kanina straight ibig sabihin di nakakapagod o sawa pakinggan.

ganda. lalo na ang diy case

salamat sir, asan na yung sa iyo may nakuha ka na ba  try mo din hypex or yung sa aliexpress na clones, pag may time at extra budget try ko yan mas mura...

boss ilan watts yan....

Boss nakalagay sa specs niya in BTL at 1% THD 550W @ 4ohms, at 10% 450W @ 4ohms so safe to say mga 250Wpc sa 8ohms tong gawa ko. Kanina gamit ko B1 Buffer preamp so ala gain pero mga 20% palang ng volume pot lakas na sakin, mga 25% sobra na lakas.

[Tsnad]

Boss pabulong kung magkano gastos.... sana my eb para mabitbit mo....

[ninjababez®]

Wag na bulong isigaw mo na dito bro

[dom_08]

Any comments on these ICE modules for car audio? Iniisip ko kasi baka puwede to gamitin para sa next project ko. Yung speakers ko:
100w 8ohms para sa tweeter
100w 8ohms para sa midrange
200w 4ohms para sa midbass
So kailangan ko 6ch total. Not sure kung magdadagdag pa ako ng sub, pero maghahanap pa ako.

[Nelson de Leon]

Any comments on these ICE modules for car audio? Iniisip ko kasi baka puwede to gamitin para sa next project ko. Yung speakers ko:
100w 8ohms para sa tweeter
100w 8ohms para sa midrange
200w 4ohms para sa midbass
So kailangan ko 6ch total. Not sure kung magdadagdag pa ako ng sub, pero maghahanap pa ako.

Ilan volts sir ang power supply ng modules ninyo?

[dom_08]

Nelson, wala pa.
if ok na idea ito, maghahanap na ako ng modules na gagamitin.

[Stagea]

may receivers ba na gumagamit nito?

Higher models ng Rotel and Pioneer.

[Stagea]

Nelson, wala pa.
if ok na idea ito, maghahanap na ako ng modules na gagamitin.

Mukhang kailangan nyo po ng maayos na boost converter for this project. Baka mas madali to buy ready made products, since madami nang gumagamit ng IcePower sa mobile audio sphere.

If you're dedicated in going this route, try contacting djQuan from KAC. He's had quite some success in integrating Tripath modules for mobile use.