Is the CT Sounds CT-1000.1D rated in peak or RMS watts?

It is published as an RMS rating of 1,000 watts, not a peak or max figure. RMS ratings under the CTA-2006 mobile audio standard measure continuous power at 1 percent distortion into a stated impedance at 14.4 volts. Peak and max numbers are not measured to any standard, and there is no fixed ratio between a peak figure and RMS, so RMS is the number to plan wiring and subwoofer pairing around.

What fuse size does the CT-1000.1D need?

Based on the published 1,000 watt RMS rating and an assumed 80 percent class D efficiency, current draw works out to roughly 87 amps at 14.4 volts. That draw typically calls for 2 gauge wire and a fuse sized to protect that conductor, though exact sizing also depends on the length of the run. Use a wire gauge and fuse calculator with your actual run length rather than guessing.

Does the CT-1000.1D come with a remote bass level control?

The published specifications and manual we reviewed do not confirm a remote bass knob for this model, so we are not going to claim one exists. Check the current retail listing and the printed manual that ships with your specific unit before assuming this feature is included, since packaging and included accessories can change between production runs.

How much current draw should I plan for with the CT-1000.1D?

Plan for roughly 87 amps of continuous draw, calculated as the published 1,000 watt RMS rating divided by an assumed 80 percent class D efficiency at 14.4 volts. That efficiency figure is a common convention for class D amplifiers, not a number CT Sounds publishes for this specific model, so treat 87 amps as a planning estimate rather than a guaranteed measurement.

Is a capacitor necessary with the CT-1000.1D?

Not automatically. A capacitor only buys a fraction of a second of reserve energy and does not fix a weak ground, undersized battery or low output alternator, which are the actual causes of dimming lights. The more effective order is a big 3 upgrade, a clean ground, a second battery and a higher output alternator, with a capacitor considered last if voltage dip persists after those fixes.

Will the CT-1000.1D fit in a small trunk?

It is marketed with a compact chassis intended for tight trunk and under-seat installs, which is part of its appeal for single-subwoofer builds in smaller vehicles. Exact dimensions were not part of the specification set we relied on for this review, so measure your intended mounting space against the current listing's dimensions before buying rather than assuming it will clear a specific cavity.

Amplifiers

CT Sounds CT-1000.1D Review: Draw, Fuse Size and Fit

Researched from published physics, alignment relations and manufacturer specifications. Updated 2026-09-17.

Quick answer

The CT Sounds CT-1000.1D is a compact monoblock class D amplifier with a published 1,000 watt RMS rating, which works out to roughly 87 amps of current draw at 14.4 volts and should be wired and fused accordingly.

The CT Sounds CT-1000.1D is a compact monoblock class D amplifier built around a single published number: 1,000 watts RMS. For a car audio buyer trying to run one subwoofer without giving up a full trunk to a full-size amplifier, that combination of a stated RMS rating and a small chassis is the entire pitch. The rest of the decision, from wire gauge to fuse size to whether it will actually satisfy a given subwoofer, follows from that one figure and basic electrical math.

This review is compiled from the manufacturer published specifications, the printed owner manual and the consensus of verified owner reviews. We have not installed, measured or listened to this amplifier ourselves. Every current draw and fuse figure below is calculated from the published RMS rating using standard formulas and widely used conventions, not measured on a bench, and we say so at each step rather than presenting a calculation as a manufacturer spec.

What are the published specifications?

CT Sounds CT-1000.1D published specifications
Specification	Value
Power rating	1,000 watts RMS (monoblock)
Amplifier class	Class D
Channels	1 (mono, subwoofer amplifier)
Chassis	Compact footprint marketed for tight trunk and under-seat mounts
Power figure type	RMS, not a peak or max rating
Estimated current draw at 14.4V	Roughly 87 amps, assuming 80 percent class D efficiency

Published figure Source: Manufacturer published specifications. CT Sounds publishes the 1,000 watt figure as an RMS rating rather than a peak or max number, which is the useful figure for sizing wire and a fuse. The current draw row is our calculation, not a published spec; see the section below for the formula.

How much current does the CT-1000.1D actually draw?

Amplifier current draw is calculated as RMS watts divided by the product of efficiency and system voltage: draw equals RMS watts divided by (efficiency times 14.4 volts). Class D amplifiers are commonly assumed to run around 80 percent efficient. That is a widely used convention, not a figure CT Sounds publishes for this specific unit, so treat it as an estimate rather than a spec.

Run the CT-1000.1D's published 1,000 watt RMS rating through that formula and you land at roughly 87 amps of continuous draw at a healthy 14.4 volts. That is the number that should drive every downstream wiring decision, not the 1,000 watt figure itself. Our amp fuse calculator and amp wire gauge calculator both start from this same draw-based approach rather than the wattage alone.

What fuse size and wire gauge does the CT-1000.1D need?

A fuse protects the wire, not the amplifier, and it should be sized at or below the ampacity of the conductor it is guarding. Under NEC Table 310.16 at 75 degrees Celsius, an 8 gauge conductor is rated around 50 amps, 4 gauge around 85 amps, 2 gauge around 115 amps and 1/0 gauge around 150 amps. An amplifier drawing roughly 87 amps sits right at the edge of what 4 gauge wire can safely carry, which is why most installers step up to 2 gauge for this amplifier rather than running 4 gauge at its limit.

Exact fuse and wire choice also depends on run length and voltage drop over that run, which is why we built dedicated calculators instead of printing a single number here. Whatever gauge you land on, the main fuse holder belongs within 18 inches of the battery's positive terminal, on the unprotected side of the wire run, not down at the amplifier.

Fuse placement and battery safety

Fuse near the battery, not near the amp. The primary inline fuse holder belongs within 18 inches of the battery positive terminal, on the unprotected section of wire, not at the amplifier end of the run. If that unprotected wire shorts against the chassis or a metal edge between the battery and the amplifier, a fuse mounted at the amp end does nothing to stop the resulting short. The fuse's job is to protect the wire itself.

Is 1,000 watts RMS enough for one 12 inch subwoofer?

Whether 1,000 watts RMS is enough depends entirely on the subwoofer's own RMS rating and impedance, which CT Sounds does not control and this amplifier's listing does not specify for you. A subwoofer rated well above 1,000 watts RMS will simply run underpowered on this amplifier, which is not dangerous but does leave output on the table. A subwoofer rated near or below 1,000 watts RMS at a matching impedance is a reasonable pairing on paper.

The other half of the equation is gain setting, not amplifier wattage. An amplifier with plenty of headroom still clips and distorts if the gain is set by ear instead of with a multimeter or oscilloscope against a test tone. Our gain setting calculator walks through that process, and it matters just as much on a 1,000 watt monoblock as it does on anything larger.

Who should skip the CT-1000.1D?

Anyone planning to run two subwoofers off one channel, or who needs a documented minimum impedance below what CT Sounds lists for this model, should confirm the amplifier's stable impedance range directly with the manufacturer before buying, since that figure is not part of the published data set we relied on here. Buyers who need a higher RMS ceiling for a single high-power subwoofer should also look elsewhere, since 1,000 watts RMS is a hard ceiling on this chassis, not a conservative published number with headroom baked in.

Anyone who already knows they want a remote bass level control on the dash should verify that detail against the current listing and manual rather than assuming, since we found no published confirmation of that feature to report here.

What else to consider

Beginner

Skar Audio

Skar Audio RP-800.1D

Price varies, check the listing

A lower-wattage monoblock for buyers who know their subwoofer's RMS rating sits well under 1,000 watts and do not need the extra headroom.

Check price on Amazon

Beginner

Skar Audio

Skar Audio SA-1000.1D

Price varies, check the listing

Another 1,000 watt RMS monoblock in a similarly compact class, useful for comparing published specs side by side before buying.

Check price on Amazon

Expert

Stetsom

Stetsom Bravo Bass 1200

$159.99

A higher RMS ceiling for buyers who want headroom above 1,000 watts on a single subwoofer channel.

Check price on Amazon

Frequently asked questions

Is the CT Sounds CT-1000.1D rated in peak or RMS watts?: It is published as an RMS rating of 1,000 watts, not a peak or max figure. RMS ratings under the CTA-2006 mobile audio standard measure continuous power at 1 percent distortion into a stated impedance at 14.4 volts. Peak and max numbers are not measured to any standard, and there is no fixed ratio between a peak figure and RMS, so RMS is the number to plan wiring and subwoofer pairing around.
What fuse size does the CT-1000.1D need?: Based on the published 1,000 watt RMS rating and an assumed 80 percent class D efficiency, current draw works out to roughly 87 amps at 14.4 volts. That draw typically calls for 2 gauge wire and a fuse sized to protect that conductor, though exact sizing also depends on the length of the run. Use a wire gauge and fuse calculator with your actual run length rather than guessing.
Does the CT-1000.1D come with a remote bass level control?: The published specifications and manual we reviewed do not confirm a remote bass knob for this model, so we are not going to claim one exists. Check the current retail listing and the printed manual that ships with your specific unit before assuming this feature is included, since packaging and included accessories can change between production runs.
How much current draw should I plan for with the CT-1000.1D?: Plan for roughly 87 amps of continuous draw, calculated as the published 1,000 watt RMS rating divided by an assumed 80 percent class D efficiency at 14.4 volts. That efficiency figure is a common convention for class D amplifiers, not a number CT Sounds publishes for this specific model, so treat 87 amps as a planning estimate rather than a guaranteed measurement.
Is a capacitor necessary with the CT-1000.1D?: Not automatically. A capacitor only buys a fraction of a second of reserve energy and does not fix a weak ground, undersized battery or low output alternator, which are the actual causes of dimming lights. The more effective order is a big 3 upgrade, a clean ground, a second battery and a higher output alternator, with a capacitor considered last if voltage dip persists after those fixes.
Will the CT-1000.1D fit in a small trunk?: It is marketed with a compact chassis intended for tight trunk and under-seat installs, which is part of its appeal for single-subwoofer builds in smaller vehicles. Exact dimensions were not part of the specification set we relied on for this review, so measure your intended mounting space against the current listing's dimensions before buying rather than assuming it will clear a specific cavity.

Researched guidance, not professional advice. This review is based on published manufacturer specifications, the owner manual and the consensus of verified owner reviews, not a hands-on installation or bench test. Confirm current pricing, included accessories and exact specifications against the current retail listing before buying, and have any electrical work checked by a qualified installer.