Acoustic Research Edge Sequel
The Acoustic Research Edge Sequel is a bookshelf loudspeaker released in 1988 as part of Acoustic Research's EDGE (Efficient Design for Greater Enjoyment) series. It was built for budget-conscious audiophiles, and it gave them accuracy, build quality and value during a transitional period for the brand. It isn't as legendary as AR's earlier acoustic suspension models. Still, vintage audio enthusiasts respect it as a performer for neutral, fatigue-free sound.
Specifications
| Feature | Specification |
| Years of Production | 1988–1991 |
| Type | 2-way bookshelf speaker |
| Power Handling | 100W RMS, 2 channels |
| Nominal Impedance | 8 Ω |
| Sensitivity | 89 dB (1W/1m) |
| Frequency Response | 120-20,000 Hz (±3dB) |
| Woofer | 4-1/2" (11.4 cm) mid/woofer with rubber surround |
| Tweeter | 1" polycarbonate dome tweeter |
| Crossover | Phase-coherent 2nd-order network |
| Cabinet Design | Non-parallel walls to reduce internal standing waves |
| Internal Damping | Acoustic Blanket material |
| Dimensions (H×W×D) | 7-1/2"H x 5-1/2"W x 4-13/16"D |
| Weight | 1.5 kg (approx. 3.3 lbs) per speaker |
Key Features
- Acoustic Blanket Internal Damping: Minimizes cabinet resonance for cleaner sound reproduction.
- Phase-Coherent Crossover: Designed to preserve time alignment between drivers for a more natural soundstage.
- Non-Parallel Cabinet Walls: Reduces internal standing waves and coloration, contributing to a more accurate tonal balance.
Sound Signature
The Edge Sequel has a neutral and balanced sound profile. That is a departure from the warmer tonality of classic AR models like the AR-3a. The bass is tight, the midrange is clear and the highs are smooth, so it works for extended listening without fatigue. It does well with acoustic, jazz and vocal recordings, with precise imaging and a spacious presentation for its size and price point. It isn't overly analytical, but it reveals more detail than earlier AR designs, which fits the late-1980s shift toward transparency in speaker engineering.
Historical Context
Introduced in 1988, the Edge Sequel was part of Acoustic Research's effort to stay competitive in a rapidly evolving market. The EDGE series targeted audiophiles who wanted high fidelity without a high price tag. By this time, AR had moved beyond its acoustic suspension designs and taken up more conventional vented and transmission-line cabinet approaches. The Edge Sequel was a pragmatic blend of performance and affordability. It lacked the cult status of AR's 1960s and 1970s classics.
Maintenance and Restoration Tips
Due to its age, the Edge Sequel may need some maintenance to perform its best:
- Ferrofluid in Tweeters: Over time, the ferrofluid can dry out, leading to reduced high-frequency output or tweeter failure. Re-fluiding or replacing the tweeters with modern equivalents (e.g., from Hiquphon or OEM sources) can restore clarity.
- Crossover Components: Electrolytic capacitors in the crossover may degrade after 30+ years. Replacing them with modern film capacitors can improve reliability and sound quality.
- Grilles: Original foam grilles are prone to disintegration. Replacement fabric grilles or custom mesh covers are recommended to preserve aesthetics and protect drivers.
- Binding Posts: Check for corrosion or loose connections. Upgrading to modern 5-way binding posts improves connectivity and appearance.
- Cabinet Care: Clean with a soft, dry cloth. Avoid harsh polishes; the original finish is typically a textured vinyl wrap that can be delicate.
Market Value and Collectibility
The Acoustic Research Edge Sequel is moderately collectible, rated 4/10 on the vintage audio scale. It appeals mostly to AR enthusiasts and to people looking for affordable vintage speakers with solid engineering. In working condition, a pair typically sells for $100-$250, depending on cosmetic state and whether restoration has been done. Fully restored units with upgraded tweeters and crossovers may command slightly higher prices, especially in regions with active vintage audio communities.
It's not a blue-chip collectible, but the Edge Sequel suits listeners who value accuracy, build quality and the legacy of a pioneering audio brand.
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