Fs: Alpine 1507 Amp Brand New 2 X 455w Or 2 X 900w

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Item: Alpine MRV-1507 amplifier

Location: Nowra

Item Condition: BRAND NEW

Price: $650

Contact Details: PH 0421582221

I have for sale a brand new ALPINE MRV-1507 Amp.

I live in Nowra on the south coast. Note. these amps retail for $730 US dollars

Amp has to go.

Ph: 0421582221

$650

This amp was bought to drive four 12" subs in a car i had. Crafted a custom fiberglass enclousure in the boot. Crashed the car before I fitted the amp.

I have since gorn away from car audio. The amp is brand new and has never been used. I use to work as a custom car audio installer and bought the amp after my boss won the SQ PRO class at summernats twice with one of these amps.

Read the specs and a review as attached below:

Alpine MRV-1507

With a stylized design and solid performance, Alpine’s latest class AB amp offers big power.

Alpine MRV-1507 Specs

Price & Contact: $730 USA; 310-326-8000

All measurements @ 14 volts unless otherwise specified.

Frequency Response (4 Ohm IHF Load 20Hz to 20 kHz, 1 kHz Ref.): +0 dB, -0.2 dB

L/R channel error, max deviation 20 Hz to 20 kHz: 0.2 dB

Phase Response (4-ohm IHF Load 20Hz to 20kHz 1kHz Ref.): +6.5 degrees, -12.3 degrees

Signal-to-Noise Ratio (Below Rated Output, “A” weighted): -118.2 dB

Distortion at Rated Output @ 1 kHz: 0.25% @ 900 watts

Output Power(resistive) minimum output 20 Hz to 20 kHz @ 1%THD+N (all channels driven into 4 ohms): 274 watts x 2 @ 14 volts; 225 watts x 2 @ 12.8 volts; 140 watts x 2 @ 10.5 volts

Output Power (resistive) minimum output 20 Hz to 20 kHz @ 1%THD+N (all channels driven into 2 ohms): 455 watts x 2 @ 14 volts 371 watts x 2 @ 12.8 volts; 227 watts x 2 @ 10.5 volts

Output Power (4-ohm IHF Reactive Load @ 60 Hz to 1% THD+N): 995 watts

Crosstalk (Referenced to Rated Output, 20 Hz to 20 kHz): -52 dB

Damping Factor @ 100 Hz, 2 ohms: 348

Voltage for Rated Output: 215mV to 4.5 volts

Idle Current Draw: 1.5 amps

Current Draw @ 1/3 Maximum Power: 63.5 amps @ 316 watts

Efficiency @ 1/3 Maximum Power: 36%

Power-Up Noise: -3.7 dB SPL

Power-Down Noise: 22 dB SPL

by Brian Smith

The MRV-1507 is a two-channel amplifier with power ratings of 225 watts x 2 or 900 watts x 1 into 1-ohm loads and 450 watts x 2 into 2-ohm loads. Features include an internal crossover and subsonic filter, line level outputs, fan-forced cooling, and a low frequency EQ with full parametric operation.

Performance

I’ll give it to you straight — You’d be hard pressed to find one that performs better overall than the MRV-1507. I’ve seen a whole lot of class A/B’s in this power range over the past few years and have come to dread them. They’re usually the biggest of pains to deal with and are often frighteningly unstable. Anything that draws 140 amps and hums like a high voltage transformer is bound to cause some apprehension. There are times when one feels led to probe the limits carefully, lest the magic smoke should appear.

By comparison, the MRV-1507 ran with no more fuss than a good amp half it’s size. Of course, it has a much larger appetite than a 100-watt x 2 unit, but it’s very well behaved and produces impressive performance specs. Signal-to-noise of 118 dB and 36 percent efficiency at 1/3 power are pretty rare numbers, especially in a kilowatt amp.

Connections & Adjustments

The MVR-1507’s chassis is laid out with power connections on one end and input/output connections and configuration switches at the other. All of the units variable controls are located on top of the heat sink with a protective cover. Connections to the amp include RCA inputs, RCA line level outputs, and 1/2-inch spade receptacles for all power and speaker connections. The amp has an extra B+ connection, which can be used to bypass the internal fuse and line choke. Switched adjustments include input mode, phase invert, crossover enable, and parametric EQ enable. Variable adjustments include input sensitivity, high pass cutoff frequency (30 Hz to 200 Hz), low pass cutoff frequency (30 Hz to 200Hz), and the parametric EQ controls, which include center frequency (30 Hz to 200 Hz), Q factor (1 to 10) and boost/cut (+/-12 dB), and a fixed subsonic filter.

Installation

A parametric bass EQ? Hello, now you’ve really got my attention. Simple bass boost is one of the most useless features in car audio. It wasn’t designed to fix problems; rather, the idea was to give the customer more of what they already had (bass). If you don’t know any better, or are primarily concerned with being obnoxiously loud, that might sound like a good idea. However, if you’re looking for SQ and do know better, then an arrangement such as the one found here will be much more likely to satisfy. The ability to cut rather than boost is particularly helpful. You can actually smooth a lump in response with a little bit of cut, but all the boost in the world will never correct a destructive resonance. Try removing what you don’t want rather than boosting what you do — it really works. (Alpine reports that this is part of the company’s BassEngine system concept — it allows users to maximize the sound quality and impact of bass reproduction in any vehicle.)

At about 2.4 x 10.3 x 21 inches, and about 19 pounds, the MRV-1507 definitely won’t fall into the small amp category. However, it appears to have a decent heat sink design in addition to fan-forced cooling. All controls are either recessed or otherwise protected and, well, it’s just a good looking amp. The subdued matte gray and brushed aluminum finish indicates that there are a few companies in mobile audio that have retained some measure of class. There’s more than enough room on the top of the MRV-1507 for one of those 1500-watt MAX POWER blurbs, but Alpine didn’t go that route. I guess tacky amps aren’t in their repertoire.

[BAILED]

Would you swap for a BenQ home theatre projector ?

http://www.benq.com.au/HomeShowProduct.asp?Prodid=154

[BAILED]

$500 deliverd ? i will take it

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Sory now sold