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Forum: Audio/Stereo 04-10-2014, 08:30 PM
Replies: 9
Views: 299
Posted By David Analog
It is a good amplifier....no doubt. But you are...

It is a good amplifier....no doubt. But you are missing the point. The comments apply to virtually all amplifiers and test reports from independent reviewers, such as PasMag, prove the following...
Forum: Audio/Stereo 04-10-2014, 05:14 PM
Replies: 1
Views: 78
Posted By David Analog
The Exile amplifier will not meet spec. You can...

The Exile amplifier will not meet spec. You can bank on that.

The JL Audio amplifier can be replaced with the more efficient JL Audio Class D M600/6 or a better selection would be the M700/5.
The...
Forum: Audio/Stereo 04-10-2014, 02:33 PM
Replies: 9
Views: 299
Posted By David Analog
The answer to the original question is 'yes' and...

The answer to the original question is 'yes' and 'no'.
You can safely run all four channels at a 2-ohm load per the manufacturer specs.
But you run into limitations. First, the amplifier is UNlikely...
Forum: Audio/Stereo 04-08-2014, 12:06 PM
Replies: 24
Views: 458
Posted By David Analog
The sub section of that amplifier perfectly hits...

The sub section of that amplifier perfectly hits the sweet spot for two 'M' series IB 10" subs. The 900/5 has two power supplies so it is like two (sub and satellite) amplifiers in one chassis. It's...
Forum: Audio/Stereo 04-06-2014, 11:28 PM
Replies: 55
Views: 2,110
Posted By David Analog
The MX 7.7" is intended for listening at a close...

The MX 7.7" is intended for listening at a close proximity. It's warm and sounds good. It will be fine for listening right off the swim deck at rest at a moderate volume.

The same pod is available...
Forum: Audio/Stereo 04-06-2014, 09:11 PM
Replies: 55
Views: 2,110
Posted By David Analog
Keep in mind that speaker is using the MX series...

Keep in mind that speaker is using the MX series 7.7" and not the M series 7.7" used by factory.
Lighter midbass driver and only a 0.75" dome packaged with a 7.7" midbass. IMO, okay for an in-boat...
Forum: Audio/Stereo 04-06-2014, 02:37 PM
Replies: 46
Views: 2,143
Posted By David Analog
There is more involved with properly venting the...

There is more involved with properly venting the compartment than just the bass radiation. Without a vent the bass pressure within the compartment and adjoining gunnel cavities is higher. That...
Forum: Audio/Stereo 04-05-2014, 04:41 PM
Replies: 20
Views: 388
Posted By David Analog
The meaningless rating is 2000 watts. The...

The meaningless rating is 2000 watts. The CEA-2006 rms rating at 4-ohms is 900 watts. I seriously doubt that with a realistic voltage supply, across the entire audio bandwidth, and with all channels...
Forum: Audio/Stereo 04-05-2014, 12:04 PM
Replies: 30
Views: 703
Posted By David Analog
The manufacturers speaker power rating is the...

The manufacturers speaker power rating is the maximum continuous rms power at which the speaker can dissipate heat without damage. That is the thermal rating that I referenced.

'Care' relates to how...
Forum: Audio/Stereo 04-05-2014, 11:07 AM
Replies: 30
Views: 703
Posted By David Analog
Yes. Stepping up from one pair of 7.7"s to one...

Yes.
Stepping up from one pair of 7.7"s to one pair of 8"s with the same power will not get it done.
Either double what you have in both speaker and power or replace what you have with a pair of...
Forum: Audio/Stereo 04-05-2014, 10:34 AM
Replies: 30
Views: 703
Posted By David Analog
That's 200 watts per each 4-ohm speaker. You'll...

That's 200 watts per each 4-ohm speaker. You'll never produce that much power because you are not supplying the amplifier with a 14.4 volt supply. So that is more like 150 watts per speaker. They can...
Forum: Audio/Stereo 04-04-2014, 01:14 PM
Replies: 5
Views: 203
Posted By David Analog
When they don't pick up that usually means they...

When they don't pick up that usually means they are presently in a conversation. I would imagine they are always busy this time of year. So just leave a message. Or email with the provisions on their...
Forum: Audio/Stereo 04-04-2014, 11:42 AM
Replies: 5
Views: 203
Posted By David Analog
That is a great amplifier. And you could run four...

That is a great amplifier. And you could run four in-boat speakers on the front (1&2) two channels with the two tower speakers on the rear (3&4) channels.
But, it is not enough power. Period.
Check...
Forum: Audio/Stereo 04-03-2014, 07:45 PM
Replies: 19
Views: 775
Posted By David Analog
Odin with Earmark Marine is offering the same...

Odin with Earmark Marine is offering the same discount terms on JL Audio marine products through the month of April with progressively deeper discounts on zone and system packages.
Forum: Audio/Stereo 03-28-2014, 09:48 AM
Replies: 8
Views: 399
Posted By David Analog
80 Hz lowpass is a low crossover point for a...

80 Hz lowpass is a low crossover point for a 10-inch sub, especially in an open boat. In a sealed box it is already at half power at 50 Hz or higher....then the crossover has it at half power at 80...
Forum: Audio/Stereo 03-28-2014, 01:45 AM
Replies: 8
Views: 399
Posted By David Analog
Hiss through a subwoofer is certainly an odd...

Hiss through a subwoofer is certainly an odd thing to have.
The amplifier's lowpass crossover would inhibit any hiss from an upstream source.
While there is a large difference between a woofer and a...
Forum: For Sale: Parts & Accessories 03-26-2014, 04:39 PM
Replies: 84
Views: 6,471
Posted By David Analog
Check in with Earmark Marine on these. Here's...

Check in with Earmark Marine on these. Here's why. The Pro80 and Pro60 rings need to be unique in that they cannot space out the HLCD driver so that the motor structure is pulled out of the internal...
Forum: Audio/Stereo 03-25-2014, 08:18 PM
Replies: 13
Views: 481
Posted By David Analog
With list of noise issues I would assume that you...

With list of noise issues I would assume that you have problems with B+ supply and ground potentials being different from audio component to audio component. A single B+ point and a single ground...
Forum: Audio/Stereo 03-21-2014, 10:22 AM
Replies: 9
Views: 400
Posted By David Analog
A good IB infinite baffle subwoofer can go just...

A good IB infinite baffle subwoofer can go just as deep as a good AS air suspension subwoofer in a small sealed enclosure. You may see that the IB woofer has a higher natural resonance on the spec...
Forum: Audio/Stereo 03-20-2014, 02:38 PM
Replies: 6
Views: 193
Posted By David Analog
A single five-channel amplifier could do the job...

A single five-channel amplifier could do the job like this....
*Channel five running the two subs, although that doesn't take into consideration the impedance, voice coil type, and configuration...
Forum: Audio/Stereo 03-19-2014, 09:08 PM
Replies: 12
Views: 425
Posted By David Analog
Actually your box volume is very easy to...

Actually your box volume is very easy to calculate. break the box into the three clear sections. On the last angled section, swap the triangle over to the opposite side and convert it into a pure...
Forum: Audio/Stereo 03-19-2014, 12:25 PM
Replies: 17
Views: 1,205
Posted By David Analog
The 900/5 is enough power to drive four inboat...

The 900/5 is enough power to drive four inboat speakers very well. Just make sure that this particular amplifier is always run into a symmetrical front and rear impedance load. The sub channel is...
Forum: Audio/Stereo 03-19-2014, 12:07 PM
Replies: 12
Views: 425
Posted By David Analog
If your box is too large, it is easy enough to...

If your box is too large, it is easy enough to block the inside to lower the displacement. Or, just seal in a spaced-out and false rear wall. Make a small sealed MDF box and insert it just to test....
Forum: Audio/Stereo 03-13-2014, 05:46 PM
Replies: 5
Views: 184
Posted By David Analog
I see 'subwoofer', 'swivel and 'tower' in the...

I see 'subwoofer', 'swivel and 'tower' in the same question. I hope I misunderstood and all three terms are not linked. Because placing a subwoofer on a tower is a complete waste.
Forum: Audio/Stereo 03-13-2014, 02:35 PM
Replies: 9
Views: 236
Posted By David Analog
It's time to roll.

It's time to roll.
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