DS18 PRO-TWN6.4 Review: 4-Inch High-Compression Tweeter, 150 W RMS (Program)
The DS18 PRO-TWN6.4 is a 4-inch high-compression neodymium tweeter with a 32 mm (1.25 in) voice coil and a polyimide diaphragm, rated at 150 W RMS (program) and 300 W peak into 4 ohm, with a listed sensitivity of 109 dB. Its Indian MRP is ₹9,990, the highest of the three PRO-series tweeters we list, and at 100 mm across it is also the largest. It suits a builder working on a custom pod or baffle who has a DSP or an amplifier channel to filter and level it. This review covers the figures, the filtering to plan for, what DS18's own shop reviewers say and how it compares with the smaller PRO tweeters. You can see it on our DS18 PRO-TWN6.4 product page.
Key takeaways
It is sold as a single tweeter, so a left-and-right pair means buying two.
The listing gives 150 W RMS (program), 300 W peak and 75 W AES. Its 109 dB rating is 4 dB above the 105 dB listed for the PRO-TWN4 and PRO-TW820.
DS18 recommends a 3 kHz high-pass and does not list a bass blocker, so plan the filtering yourself.
The body is 100 mm across and needs an 82 mm cutout, so expect to build a pod or baffle for it.
DS18 PRO-TWN6.4 specifications
Specification | DS18 PRO-TWN6.4 |
|---|---|
Type | 4-inch (100 mm) high-compression neodymium tweeter |
Impedance | 4 ohm |
Power handling | 150 W RMS (program); 300 W peak; 75 W AES |
Sensitivity | 109 dB (1 W / 1 m) |
Frequency response | 2 kHz to 20 kHz |
Recommended high-pass | 3 kHz |
Voice coil | 32 mm (1.25 in), Kapton former, CCAR winding |
Diaphragm and magnet | Polyimide diaphragm, neodymium magnet |
Body | Black machined aluminium with an aluminium bullet; flush mount |
Overall size | 100 mm (3.93 in) diameter, 50 mm (1.96 in) deep |
Cutout and mounting depth | 82 mm (3.22 in) cutout; 45 mm (1.77 in) depth |
Weight | About 0.58 kg (1.28 lb) per DS18's page |
Bass blocker | Not listed |
Replacement diaphragm | PRO-TWN6.4VC |
Sold as | Single piece |
Warranty | Per DS18's published terms; confirm India terms with us |
India MRP | ₹9,990 |
Figures come from the DS18 product page and the PRO-TWN6.4 manual, matched against our listing. DS18's spec table puts 1.05 oz on the Body Material row, an apparent slip that the manual lists as magnet weight, so we have not used it.
DS18 PRO-TWN6.4 power ratings: RMS (program), peak and AES
Here the labels line up better than on some DS18 tweeters. The page's key features give RMS Power as 150 Watts with 300 Watts peak, and our listing says 150 W RMS (program) and 300 W peak. The spec table and the manual call the same numbers Program and Peak, add 75 W AES, and the manual never uses the word RMS. So 150 W is the figure to size an amplifier channel against, 300 W is a peak number, and 75 W AES is the lowest of the three.
At 109 dB, this tweeter needs very little of that. DS18's help page advises choosing an amplifier that can output the correct RMS rating for the speakers, and describes clipping as distortion from an overdriven amplifier. For a tweeter this sensitive the practical risk is not too little power but a clipped or unfiltered signal, so set gains with care.
Filtering and level for a 109 dB tweeter
DS18 lists a 2 kHz to 20 kHz response and recommends a 3 kHz high-pass. It does not mention a bass blocker on the page, in the spec table or in the manual, and there is no box-contents list. That is different from the PRO-TWN4 and PRO-TW820 listings, which both mention one. Do not assume either way: set a 3 kHz or higher high-pass in your DSP or amplifier, and ask us if you need to confirm what is supplied.
Level matters more here than on the smaller tweeters. A reviewer on DS18's shop says these were very loud even on head-unit power, which fits the 109 dB rating. A head unit's output is full range, though, so filtering is still needed. If you have a DSP, our guides on why it helps and how to set it up cover trimming a tweeter down to match the rest of the stage.
What owners and reviewers say about the DS18 PRO-TWN6.4
We did not find independent owner reviews, forum threads or magazine tests for the PRO-TWN6.4 that we could read when we checked in October 2026. The only feedback we could read is on DS18's own shop page. It is the maker's shop, so it is not independent.
The page showed three reviews, all in the top rating bar, with no star labels or average in the text we read. Only one has any text: the reviewer calls the tweeters very loud even on head-unit power and says that impressed them. Another is titled Perfect with no comment, and the third carries only the product name. Nobody mentions the amplifier, the crossover or how the tweeter was mounted, so there is no long-term or set-up evidence here. If you run one, we would like to hear how you set it up.
DS18 PRO-TWN6.4 vs PRO-TWN4 and PRO-TW820
The DS18 PRO-TWN4 (₹6,990 MRP) is a 3-inch tweeter rated 140 W RMS (program) and 105 dB, with a 2 kHz recommended high-pass, a 52 mm cutout and a bass blocker mentioned in its listing. It is the smaller, lower-priced way into the same family of PRO drivers.
The DS18 PRO-TW820 (₹7,990 MRP) is smaller still at 2.3 inches, rated 100 W RMS (program) and 105 dB, with the same 3 kHz recommended high-pass as the PRO-TWN6.4. Its listing includes a mounting ring, two gaskets and a 3.3 µF / 50 V bass blocker. The PRO-TWN6.4 is the one to look at when you have room for a 100 mm body and want the higher 109 dB rating.
Who should buy it, and who shouldn't
Buy the PRO-TWN6.4 if you are building a custom pod or baffle, you can supply a 3 kHz or higher high-pass and a level trim, and you have the space for an 82 mm opening.
Look elsewhere if you want something that bolts into a factory tweeter position, or you want a bass blocker confirmed in the box. For the bass blocker, start with the smaller PRO-TWN4, whose listing mentions one; otherwise choose a component set that arrives with crossovers, such as the DS18 ZXI-62C.
Installation notes for Indian cars
DS18's overview says this tweeter is designed to fit most spaces with slight modification or fabrication. In practice that means a pod: the 100 mm body and 82 mm cutout are far larger than a typical factory tweeter opening, and it needs 45 mm of depth behind the panel. See also our article on aluminium pods in 3-way sound systems.
DS18's page gives about 0.58 kg, so fix the pod properly and do not rely on adhesive alone, especially on a dash top that bakes in an Indian summer. VA3 Car Studio in Ghaziabad offers professional installation and can build speaker pods and door baffles around it.
DS18 PRO-TWN6.4 price and where to buy
The DS18 PRO-TWN6.4 carries an MRP of ₹9,990 in our catalogue. VA3 Car Studio often sells below MRP, so check the current offer on the PRO-TWN6.4 product page. The listing is for one tweeter, so order two for left and right. DS18 lists the PRO-TWN6.4VC as the replacement diaphragm.
The bottom line
The DS18 PRO-TWN6.4 is the largest and most sensitive of the three PRO tweeters we list, and it asks the most of the person fitting it. Size around 150 W RMS (program), treat 300 W as peak, supply your own 3 kHz high-pass unless you confirm a bass blocker, and expect to build a pod. The feedback we could read is three reviews on DS18's own shop and says very little, so judge it on the specifications and your set-up.
DS18 PRO-TWN6.4 FAQ
Is the DS18 PRO-TWN6.4 sold as a pair?
No. The listing is for a single tweeter, one piece, so a left-and-right setup needs two. Check the quantity before you order, and ask us if you are unsure.
What is the RMS power of the DS18 PRO-TWN6.4?
Our listing and DS18's key features give 150 W RMS (program) at 4 ohm. The 300 W figure is peak and 75 W is the AES rating. Size your amplifier against the RMS (program) figure, not the peak.
Does the PRO-TWN6.4 come with a bass blocker?
DS18 does not list one on the product page, in the spec table or in the manual, and the page has no box-contents list. Do not assume one is included. Set a 3 kHz or higher high-pass on your amplifier or DSP, and ask us if you need to confirm what is supplied.
Can I run the PRO-TWN6.4 straight from a head unit?
One reviewer on DS18's shop calls it very loud even on head-unit power, which fits the 109 dB rating. A head unit gives a full-range signal, though, and DS18 recommends a 3 kHz high-pass, so add a filter before the signal reaches the tweeter.
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