A Compact Replacement Set for the Panasonic SC-BTX70
This is a useful package for someone retaining a working Panasonic SC-BTX70 main unit but needing its original speaker complement. The front pair and separate subwoofer form the system’s 2.1 layout, keeping the visible speakers compact while giving bass reproduction its own enclosure.
It may also suit an owner considering a suitably configured passive-speaker installation, provided amplification, filtering and connections are checked first. These are system speakers designed to work with matching electronics, so their compatibility deserves more attention than simply finding plugs that fit.
More Than a Simple Single-Driver Satellite
Each front speaker uses a two-way, three-driver bass-reflex layout, with a front woofer, an additional top woofer and a cone tweeter. Panasonic specifies bamboo material for the front woofer and tweeter. The upward-facing driver is part of the original acoustic arrangement, so the top of each cabinet should remain unobstructed.
The SB-HW560 uses Panasonic’s Kelton-type bass enclosure, combining a driven woofer with a larger passive radiator. A passive radiator moves in response to pressure within the enclosure rather than having its own voice coil. It assists the bass loading of the cabinet; it does not provide amplification.
Technical Specifications
SB-HFX70 front speakers — two supplied
- Design: Two-way, three-driver bass-reflex speaker
- Drivers: 65mm front bamboo-cone woofer, 65mm top cone woofer and 50mm bamboo-cone tweeter
- Impedance: 6Ω
- Maximum input power: 125W IEC per speaker, with the specified low-cut-filter-equipped amplifier
- Sensitivity: 80dB/W at 1 metre
- Published frequency range: 100Hz–40kHz at −10dB
- Dimensions: 134 × 246.5 × 114mm each (W × H × D)
- Weight: Approximately 1.3kg each
SB-HW560 subwoofer — one supplied
- Design: Passive Kelton-type subwoofer
- Driver / passive radiator: 160mm cone woofer and 250mm passive radiator
- Impedance: 6Ω
- Maximum input power: 250W IEC
- Sensitivity: 78dB/W at 1 metre
- Published frequency range: 40Hz–198Hz at −10dB
- Dimensions: 181 × 361 × 315mm (W × H × D)
- Weight: Approximately 4.7kg
Source: Panasonic SC-BTX70 operating instructions, RQT9464/RQT9479, speaker specification section. View the manufacturer’s manual.
The wattage figures above are speaker input ratings, not amplifier output. The published frequency ranges use −10dB limits and should not be compared directly with tighter ±3dB response specifications.
Important Amplifier and Connection Requirements
All three cabinets are passive. In particular, the subwoofer requires an amplified bass feed: a normal RCA “SUB OUT” or LFE socket on an AV receiver cannot drive it directly. The matching Panasonic main unit supplies the required amplification and signal processing.
Use with other equipment requires appropriate 6Ω-capable amplification, a correctly filtered subwoofer channel and suitable high-pass filtering for the front pair. Panasonic’s original speaker wiring and main-unit connectors should also be checked against the intended installation. Please contact us by phone or email if you need help confirming compatibility before purchase.
Supply is limited to the two front speakers and subwoofer. No playback electronics, amplifier or additional accessories are being included in this listing.
Why Buy From Us?
Wilkinson’s Hi-Fi is an established family dealership with more than 40 years of experience selling second-hand hi-fi and home-cinema equipment.
- Three-month guarantee: Included with this speaker package.
- Pre-sale checks: Equipment is checked before being offered for sale.
- Honest descriptions: Clear information about cosmetic condition, supplied components and compatibility.
- Established dealer support: Unlike buying from an unverified eBay or private seller, you have a hi-fi business to contact for assistance.
- Professional packaging: Prepared carefully to help protect the cabinets and drive units in transit.
- After-sales advice: Available by phone or email.
- Competitive pricing: Set with the wider second-hand market, including eBay, in mind.
Summary
An affordable option for replacing the speaker complement of a compatible Panasonic system, or for a carefully planned passive 2.1 installation. Offered at £40 for all three cabinets together as a single lot.
