Pioneer GM-D1004 4-channel Car Amplifier Review

[amirm]

Just for fun, but it also a channel that really measures things (power @1% THD and burst) as ASR

Yeh, I have watched a lot of his videos. Hard to keep track of the data though as he runs through them quickly. But his is a fun guy to watch.

 

[doodlebro]

Wow, impressed with the power filtering on such a small, inexpensive amplifier.

Who's going to build a budget HT with these as monoblocks?

 

[suttondesign]

can of worms. i wish you would stick to home gear

 

[Wes]

I'm glad to see some auto amplifiers tested as I'm in the market to get better sound in my car.
I hope you can test the Focal amp FDS 4.350 or others they make.

 

[Biblob]

I really like the fact these are 4 channel amps. If they are a bit more powerfull, they're very usefull for the DIY-crowd for active bi-amped two-way speakers.

 

[mk1classic]

can of worms. i wish you would stick to home gear

It's all related to the text on top the review page..
"Articles, Reviews and Measurements of Audio Products (As an Amazon Associate I earn from qualifying purchases)"

 

[SmackDaddies]

can of worms. i wish you would stick to home gear

Anything Amir does I will say thank you. (even when I disagree with him)

 

[Doodski]

can of worms. i wish you would stick to home gear

Ima not so sure about that It's always good to diversify a bit.

 

[sweetchaos]

Just like with Speakers...with more diversity, the wider the audience, and the bigger the donations. I think Amir is doing some fishing... I feel like we’re the little fish he’s caught. Lol

 

[amirm]

It's all related to the text on top the review page..
"Articles, Reviews and Measurements of Audio Products (As an Amazon Associate I earn from qualifying purchases)"

I make no money from Amazon if that is your point.

 

[sweetchaos]

@amirm I think he was looking at:

Spoiler: image

We know you're not doing the Amazon affiliate system, but consider updating that page (in the photo above) to remove that message, to avoid further misunderstandings by users.

 

[Doodski]

Just like with Speakers...with more diversity, the wider the audience, and the bigger the donations. I think Amir is doing some fishing... I feel like we’re the little fish he’s caught. Lol

Coming from a guy that worked 9 years in sales and the last 5 years of that on straight 100% commission I can appreciate creating cash flow from where there was nothing before. It's commendable, great for the economy, risk taking and more difficult than many appreciate. More contributors in both the forums and in the cash flow means more of everything in general and that's a good thing for Audio Science Review and it's membership.

 

[trl]

Fuses will hold indefinitely at 100% of their rating. At 150% of their rating it might be 3 or 4 minutes, and at 200% it might be 30 seconds. So if it were me, I'd throw a 30A fuse in it and push it to the limit with full sine waves. You may be quite surprised.

All in all, it looks like a ball-snapping bargain for car audio on the cheap.

PS You're gonna need a bigger boat (PSU)

View attachment 50695

It will probably last few minutes till the output stage will overheat and probably burn.

I found some pics and measurements on http://www.xn--80aeatqv1al.xn--p1ai/az/2015/01/pioneer_amp_gm_d1004.htm:

Source: http://www.xn--80aeatqv1al.xn--p1ai/wp-content/uploads/2015/01/pioneer_inside_l.jpg​

 

[Hemi-Demon]

I for one appreciate the car audio testing. Keep em coming!!

 

[Labjr]

I know we probably won't see the same S/N distortion figures as something like Hypex Class-D amps but I would like to see a bit better specs. I wonder what can be achieved in a car environment?

 

[bilboaudio]

Thanks for the write up. What is the procedure for bridging this please if you only want it to drive two speakers, its not clear in the manual. I currently have it driving four speakers, front and rear, do I need to cut and splice wires to bridge it so it is only powering the front two speakers?

 

[amirm]

Just set the switch to 2 channel and use the wire colors in the manual.

 

[dkinric]

 

[Matias]

I know we probably won't see the same S/N distortion figures as something like Hypex Class-D amps but I would like to see a bit better specs. I wonder what can be achieved in a car environment?

Actually the Alpine PDX specs seem quite close to NCore levels.
https://www.audiosciencereview.com/...d-600-1d-nano-car-amplifier.11521/post-330869

I just wish @amirm could test an Alpine PDX-V9, should be the benchmark for car audio amps!

 

[Chrise36]

I know we probably won't see the same S/N distortion figures as something like Hypex Class-D amps but I would like to see a bit better specs. I wonder what can be achieved in a car environment?

According to Alpine for the PDX series:
Total Harmonic Distortion Rate (THD) vs. Frequency
The all-new PDX series amplifiers are not your typical class-D amplifiers. Traditionally, class-D amplifiers have not been known for high frequency reproduction. These new PDX amplifiers are the first ever class-D amplifiers to break tradition and trump the amps of yesterday. The PDX-M12, PDX-M6, PDX-F6, and PDX-F4 are synonymous with extremely high frequency reproduction. The THD is actually falling at high frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortions. -<0.005% THD+N @ 1W, <0.05% THD+N @ rated power.

Signal to Noise
These amps are capable of unheard of S/N ratio up to 95dB S/N @ 1W, 122dB S/N at rated power for extremely clean, uncolored sound. Forget unwanted background noise or static. The PDX amps deliver crystal clear music every time.
Also ETON amps have good specs like this one:https://mobil.hifitest.de/test/car-hifi_endstufe_4-kanal/eton-mini_1504_17013