67 replies to this topic

[blabla]

Hi,

I'm looking at getting another mono for sub. My sub is in custom box is to spec. It's a Phillips cp 1200 its 400wrms at 4 ohm. My budget is 300. I have looked at a few here are some;

http://www.hertzaudi.../default_en.htm
It's the HE1D. They are (Autobarn) comparing the above hertz amp to an alpine mr500 without the price tag.

http://www.ryda.com....er-p/pl1300.htm

I have used a steg 250 packed a punch and extremely clean power. So I'm trying to base my next amp on that, the amp was a mate's amp.

Thanks.

Edited by blabla, 30 January 2012 - 10:21 PM.

[RAD]

The hertz only does 200w @ 4ohm, the Nakamichi only 300w @ 4ohm. Both are under powered for what you want.

I already posted this to you on Ozhonda, the kenwood 9105D which does 500w @ 4ohm. Yes, the Hertz and Nakamichi gear is great, but they don't have the power you need @ 4ohms, and you'll find SFA for $300.

[Mr. Drifter]

Was wondering how long it'd take for him to post here xD

But yes, the kenwood is a good monoblock for the price.

[blabla]

Quote

http://www.ryda.com....-p/kac9105d.htm

500w @ 4ohm, 900 @ 2ohm or 1ohm, great if you get a second sub.

Ye I have looked at that amp. I was at autobarn the other days and they actually replaced the above amp with the hertz one I am looking at they said basically that the hertz amp ran the sub better then the Kenwood.

They were comparing the above hertz amp to an alpine mr500 without the price tag.

[blabla]

 RAD.SPL, on 30 January 2012 - 11:07 PM, said:

The hertz only does 200w @ 4ohm, the Nakamichi only 300w @ 4ohm. Both are under powered for what you want.

I already posted this to you on Ozhonda, the kenwood 9105D which does 500w @ 4ohm. Yes, the Hertz and Nakamichi gear is great, but they don't have the power you need @ 4ohms, and you'll find SFA for $300.

Ok for eg I used a steg amp 250wrms and then I used a Memphis Sr with 300wrms. The steg provided a better sound then the Memphis. Tell why that is?

[blabla]

 Ben-Drifter, on 30 January 2012 - 11:09 PM, said:

Was wondering how long it'd take for him to post here xD

But yes, the kenwood is a good monoblock for the price.

That's great I don't like Kenwood!

[RAD]

Yeah i read that on Ozhonda already. I'm probably wasting my breathe, but i'd love to hear how the hertz amp is going to run the sub "better" with only 200w, vs 500w of the kenwood.

I'm here telling you this as someone who's looking out for your interests, not Autobarn who needs to sell some old stock, or keep hertz or their distributors clarion happy by moving stock.

There could be many reasons why the steg sounded better; you cocked up a setting with either the gain, LPF set too high or low, bass boost turned on, Subsonic filter set too high, poor grounds, too low impedence, poor ground, or maybe the steg is underrated compared to the memphis.

If you don't like the Kenwood, save your cash to buy an amp that does 400w @ 4ohms or more from a brand you like, but at $300 beggars can't be choosers.

[Mr. Drifter]

Exactly. The MRP-M500 is pretty much what you'd want... (coming from somebody who only really knows about alpine and kenwood <barely at that, I don't pay attention to amps unless I'm going to buy them/ am researching>) The alpine MRP-M500 (assuming you're talking about that) and the kenwood KAC-9105d are about what you'd want.

[RAD]

Two friends have had the 9105D, very impressed with the power for their price. Have had the older model alpine, the MRD-M500. A nice amp, but was only 300w @ 4ohm, needed a dual 4 sub to get the most out of it. Not overly efficient though, would use 75-80A at full tilt.

[blabla]

 Ben-Drifter, on 30 January 2012 - 11:37 PM, said:

Exactly. The MRP-M500 is pretty much what you'd want... (coming from somebody who only really knows about alpine and kenwood <barely at that, I don't pay attention to amps unless I'm going to buy them/ am researching>) The alpine MRP-M500 (assuming you're talking about that) and the kenwood KAC-9105d are about what you'd want.

That's the one, well that's the alpine there are comparing the hertz to. That amp was offered to me at 320. I wonder if the can hook one of the hertz ones up. Well the sub is single voice coil.

Edited by blabla, 30 January 2012 - 11:49 PM.

[Damon]

 blabla, on 30 January 2012 - 11:23 PM, said:

Ok for eg I used a steg amp 250wrms and then I used a Memphis Sr with 300wrms. The steg provided a better sound then the Memphis. Tell why that is?

Easy.

Power output between the two is within 1dB so pure power output was not an issue between the two amplifiers, therefore:

1. One of the amplifier 'clips' smoother than the other, or one was clipping and one was not.
2. The low pass filters between the two had differing slopes and/or cut off points
3. Additional signal processing like bass boost was applied differently between the two
4. One had its phase inverted compared to the other
5. Any combination of the above factors combined




.

Edited by Damon, 31 January 2012 - 06:41 AM.

[blabla]

 Damon, on 31 January 2012 - 06:40 AM, said:

Easy.

Power output between the two is within 1dB so pure power output was not an issue between the two amplifiers, therefore:

1. One of the amplifier 'clips' smoother than the other, or one was clipping and one was not.
2. The low pass filters between the two had differing slopes and/or cut off points
3. Additional signal processing like bass boost was applied differently between the two
4. One had its phase inverted compared to the other
5. Any combination of the above factors combined




.

The steg had module that you plug into the bottom and a slope adjustment, it was setup gain on half a quarter turn on the bass boost. The Memphis had a subsonic filter set a 30 gain was about half boost on 6, setup almost the same the steg made the sub sound better. Memphis made it sound dirty.

[blabla]

So can anybody enlighten me on what I should be looking at then for this sub. Please remember there is no cap to make up the voltage to 14.4v. Sub is in a sealed box to spec, sub is 400wrms.

Do not want Kenwood, JVC and fusion etc.

Edited by blabla, 31 January 2012 - 07:37 PM.

[REVNSS.inc]

If the sub is a single 4 ohm voice coil perhaps look for a descent two channel and bridge it.

Clarion dpx2251 does 600w RMS bridged, pioneer prsd2100t does 600w RMS as well, I believe the old jaycars were similar. These amps I have seen currently for sale for around $200.

[shiny_car]

Mod EDIT - thread cleaned up

Advice: best to continue to bite your tongue rather than openly criticise. Play nicely.