Peerless by Tymphany SDS-P830878 Passive Radiator

passive | 3.5"

€ 12,36€ 14,95 10+ In stock

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Product description Peerless by Tymphany SDS-P830878 Passive Radiator

A useful alternative to overlong ports, passive radiators like the Peerless by Tymphany 830878 offer designers a well-proven method of extending and enhancing bass response

Highlights of the Peerless SDS-P830878 Passive Radiator

Coated paper cone with rubber surround
Low resonance frequency for deepest possible bass
Cosmetic surface mount steel frame matches Peerless SDS series
Straight-sided frame fits into narrow enclosures and permits tight spacing
Compatible with small woofers by Peerless and others

Product details Peerless SDS-P830878 Passive Radiator

Peerless by Tymphany SDS-P830878 3-1/2" Passive Radiator

This 4 inch member of the SDS family is a passive radiator, designed to match up with SDS subwoofers, and features a coated paper cone with rubber surround, and a narrow-profile steel basket shaped to fit into narrow cabinets.

FAQ about the Peerless SDS-P830878 Passive Radiator

What are some ideal applications for this passive radiator?

The SDS-P830878 is perfect for:

Compact subwoofer systems.
Portable Bluetooth speakers.
Bookshelf speakers needing deeper bass in a small enclosure.
High-end custom DIY audio projects.

How do I calculate the optimal tuning frequency for my system?

To calculate the tuning frequency, consider:

Active Driver Parameters: Check the Thiele/Small parameters of your active driver (Fs, Vas, Qts).
Enclosure Volume: Determine the internal volume of your enclosure.
Radiator Mass: Adjust the SDS-P830878’s mass to achieve a resonant frequency slightly below the active driver’s Fs for smoother low-frequency roll-off.

Speaker design software (e.g., WinISD) is highly recommended for precise calculations.

Peerless manufacturing code: T04-1G03B0001

Reviews

10 reviews

Review this product

4 of 5

This passive radiator works very nicely in my design. I did not account for the fact that these do not have threads to bolt on added mass, but this was easily fixed by glueing on the added mass instead.

By Bodi Kiefer on 10 October 2026

5 of 5

AUTOCOSTRUIONE

By Chiara on 20 November 2025

By Marco on 3 September 2025

I use these for my first diy speaker I built and they work great.

By Emiel on 13 June 2025

By Roman on 1 October 2023

I built a mini subwoofer with 2 of these and the matching 8ohm woofer. The results were AMAZING for the size of the box. Not sure if it was necessarily down to this radiator but to have the radiator EXACTLY match the woofer is a super clean, super cool look. Love it..... and the service was as good as always. Thanks guys.

By Gary K. on 5 May 2021

Amazing. Massively increase bass output from my tiny bookshelf DIY speaker box.

By Seow Chuan L. on 9 June 2020

Gut geeignet für 3-Zoll-Woofer. Hier gibt es ja in zunehmenden Maße Treiber von TB, Wavecor, Dayton etc., die durchaus basstauglich sind, allein das notwendige Bassreflexrohr wäre für ein kleines Gehäuse viel zu lang. Betreibe den Passivradiator mit einem Dayton Audio ND91-4 in einem 3-Liter-Gehäuse, der Bass ist durchaus beeindruckend.

By Stephen B. on 19 July 2019

Prima ding, werkt goed voor mijn DIY JBL Xtreme achtig iets. Makkelijk te monteren en geeft een prima bass die ook best laag gaat, mijn box gaat zelfs tot 40hz, us echt een aanrader.

By Liam D. on 3 April 2019

I use these with 4" full range speakers. They give fantastic bass without the need for a bass port

By Philip H. on 1 June 2018

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Peerless by Tymphany SDS-P830878 3-1/2" Passive Radiator

Peerless by Tymphany SDS-P830878 3-1/2" Passive Radiator

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Product description

Pros and cons

Product description Peerless by Tymphany SDS-P830878 Passive Radiator

Highlights of the Peerless SDS-P830878 Passive Radiator

Product details Peerless SDS-P830878 Passive Radiator

FAQ about the Peerless SDS-P830878 Passive Radiator

What are some ideal applications for this passive radiator?

How do I calculate the optimal tuning frequency for my system?

Specifications

Reviews

Reviews

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Product description

Pros and cons

Product description Peerless by Tymphany SDS-P830878 Passive Radiator

Highlights of the Peerless SDS-P830878 Passive Radiator

Product details Peerless SDS-P830878 Passive Radiator

FAQ about the Peerless SDS-P830878 Passive Radiator

What are some ideal applications for this passive radiator?

How do I calculate the optimal tuning frequency for my system?

Specifications

Reviews

Reviews

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