The 21 SUB PRO PASSIVE SEALED is a jewel in the pool of subwoofers designed for the highly educated customer that is on the quest for the highest performance and understands how to differentiate sound quality. When this customer experiences the 21 SUB PRO PS unparalleled output and uncolored sound, the measured test results we publish translate perfectly to realized performance. ASCENDO’s policy is to be completely transparent and publish measurements done by independently certified third-party labs to provide factual data, thereby enabling informed, educated decisions. The The21 SUB PRO subwoofer is so far above and beyond the competition in every aspect; refined musicality, tightness, and output levels suitable for a 21"" driver. It is also engineered to operate perfectly in sync (in phase) with our Infrasonic subwoofers; The24 PRO, The32 PRO, The50 PRO, The80 PRO when there is a desire to reproduce movie content below 20Hz with the same authority, precision, and musicality.
Compared to conventional subwoofer motor concepts, the ultra-modern double-gap motor of this custom-made 21" driver with two outer and two inner voice-coils enables more linear travel and much faster directional changes with higher sound power and significantly lower power compression.
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Speaker type |
21-inch forward-firing, dual gap motor structure with 2 inner and 2 outer voice coiles, neodymium motor. |
|
Xmax |
18 mm excursion each direction (36 mm linear), voice coil remaining in homogeneous magnetic field, linear and lowest distortion |
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Passive | Active |
Passive |
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Recommended amplifiers |
1Ch DSP + Amplifier are required. Min. recommended amplifier: 109 Vrms, 154 Vpk, 27,3 A; equivalent to 3000W@4Ω with correct RMS & Peak limiting & compression settings. |
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Recommended ASCENDO amplifiers |
(With additional external 1CH DSP: AIA2-6004), DSP4-10K2 |
|
Principle |
Sealed |
|
SPL (peak / half space 2 pi) |
Measurement data |
|
Frequency range |
Measurement data |
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Efficiency |
97 dB / 1W/m |
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Power handling |
4000 W |
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Impedance |
4 Ω |
|
Air volume displacement |
2,88 L / in comparison 21" standard cinema subwoofer 1,76 L |
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Directivity horizontal x vertical in Deg° |
360° |
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Input Terminal |
Neutrik |
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Enclosure |
Internally braced birch ply and MDF |
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Width |
23,62 " | 600 mm |
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Hight |
43,31 " | 1100 mm |
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Hight with feet |
44,29 " | 1125 mm |
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Depth without grille |
14,57 " | 370 mm |
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Depth with plug |
14,57 " | 370 mm |
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Weight |
112,44 lbs | 51kg |
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Finish |
Structural paint black |
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Custom colour options |
Piano lacquer, colour of choice, matt or other finishes upon request |
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Shape customization |
Upon request |
|
Mounting |
Floor standing with feet |
Thank you for considering Yorkshire AV for your next investment in your AV or HiFi setup.
We are an approved retailer for all brands sold on our website, which means full manufacturers warranty and support as well as detailed product knowledge within our small business.
We use an inventory tracking system which states if item(s) are in stock and if not, what are the likely lead times.
Who do you use for delivery?
Our primary delivery agent is DPD. Where orders are shipped directly from Yorkshire AV, we always use DPD who offer a fabulous service at competitive rates.
If we drop ship (i.e. direct from the supplier) then the delivery agent is out of our control. It is generally DPD or UPS however - we rarely see other carriers used.
Selecting "Next Day" delivery does not mean you'll receive your item the next day in some cases. It's the next day from when the item(s) are in stock with us. If there is an urgent need then please contact a member of staff via the Live Chat or telephone (01757 826111) to check on live stock levels.
Certain product(s) are delayed in manufacturing due to semi-conductor shortages across the Globe. We'll keep you informed as to your order progress and a likely ETA once we get updates from the manufacturers.
Returns
Standard Returns
Our returns policy lasts for 28 days for all items in our store except those defined in section (1) below.
To be eligible for a refund, your item must be unused/unopened and in the same condition that you received it. It must also be in the original packaging. If you return the item to us within 14 days of purchasing, you will be offered a full refund or exchange.
If your return comes to us after 14 days of purchasing and is opened, we will refund the full amount less 20%. Unused items returned up to 28 days after purchasing will be fully refunded.
It's the responsibility of the customer to return the items at your cost.
Yorkshire AV are able to arrange collection - please contact us for a quote.
You must ensure goods are shipped in their original packaging if they are damaged/not working.
Manufacturers will not accept returns and Yorkshire AV can not be held responsible for any damage in transit.
Several types of goods are exempt from being returned.
(1) Examples of non-returnable items:
- Gift cards HiFi Racks
- Second hand units / clearance products
- Headphones (due to listener hygiene)
- Custom cables
- Special order items (items that we order in for you/were not in stock at the time of order)
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
To start to return - please email us: info@yorkshireav.co.uk along with your order number and we'll take it from there.
When will orders be dispatched?
- Orders placed Monday - Thursday before 1pm and are in stock will be dispatched the same day for next day delivery. This relates to product that state 'In Stock for immediate dispatch' on the product page.
- Orders placed over a weekend and are in stock will be dispatched on Monday.
Orders for items not in stock
Given the vast amount of variations of each product (e.g. AudioQuest cables) or Pro-Ject Audio Turntables - we keep the most common options in stock (i.e. gloss black finish, or 1.5m RCA cables) whereas longer cables or cables with terminations that are less frequently ordered will be ordered as required.
Generally speaking - we receive orders within 2-3 days for UK suppliers and 3-4 days for European suppliers (i.e. AudioQuest, DALI).
We want you to be 100% satisfied which is why we'll give you an email/call if item(s) aren't in stock and give you the option of changing the order, cancelling or if you're happy to wait a few days, we'll get it out as soon as possible.
If an item states 'Available to Order' - this means the item is not in stock but we are able to order in. Lead times average 2 days but in some circumstances, delivery times may be longer and is outside of our control. Please contact us to get an estimate on delivery times if orders are urgent.
Warranty
By default, our brands follow their standard manufacturers warranty terms and length.
For extended Warranty (should this be offered with your product), please ensure you complete the Extended Warranty registration form that was emailed to you.
Warranty claims within the warranty period are underpinned by the manufacturer. With any extended warranty claims - Yorkshire AV act as your agent to the authorised repair centre.
Shipping charges are excluded from any warranty claim. Original packaging and receipts must be provided else the claim will be rejected.
For any questions or issues - please contact us directly.