Note: The Beltronics STi Magnum has been discontinued. See the recent review of newer models
Discussions about radar detectors inevitably get around to the question: What's the best radar detector? Tough call: the definition of "best" varies widely, as do drivers' expectations.
For instance, most new owners are thrilled when their detector goes off before a radar-equipped cruiser pops into view. But on other occasions the warning inexplicably comes too late to be useful. And they're baffled by frequent K- and Ka-band alerts when they haven't seen a police vehicle for hours. Eventually they upgrade, figuring: If it's the most expensive, certainly it will deliver the best protection.
Not necessarily. Pick a model that's lousy at detecting POP-mode radar, for instance, and divine intervention may be needed to sneak past some highway patrol radar guns unscathed.
Two models claiming to be the ultimate in radar protection are the Valentine One (or V1), and the Beltronics STi Magnum. To gauge their merit, we anonymously purchased samples and ran them through our battery of tests.
Until the arrival of the Beltronics STi Magnum, the Valentine One was the only windshield-mount model in the over-$395 price segment. It's since been joined by others. These include GPS-enabled models, the Escort Max 360, Escort iX, Radenso Pro M and the Radenso XP. Also included is a non-GPS model, the Escort RedlineXR, which set a record when it detected our radar guns from a supernatural 15-mile distance.
The issue of long-range supremacy brought up a question we've never been able to answer. Nor has anyone else: Given unrestricted room, how far away can the best radar detectors spot police radar?
The Test Site
We used a 14-mile-long swath of die-straight, level highway in western Arizona. We measured its elevation at 1,000-foot intervals using GPS units, double-checking the data with Google Earth. Both showed less than a few hundred feet of elevation deviation over the length of the site.
We also tested the Beltronics STi Magnum and Valentine One at our Hill/Curve Test Site 30 miles northwest of Phoenix, the ultimate real-world test. The radar vehicle is hunkered down in a plunging S-curve, picking off targets as they pop into view less than 750 feet away.
How We Rated Them
A maximum score of 200 points was possible: 140 for radar performance and 20 each for resistance to false alarms, features and ergonomics. Radar scores were weighted by threat level. X band: 5 points, K band: 20 points and 15 each for the three Ka-band frequencies. Radar scores from the two test sites were averaged.
- Hot X/K-band range
- Class-leading laser detection
- Simple controls
- Uneven Ka-band range
- Few features
- No auto mute
- Abundant false alarms
The Valentine One, introduced in 1991, received laser-detection circuitry in the mid-1990s and a revised circuit board in 2007. Aside from minor firmware revisions over the decades, it's little changed from the original.
The V1 delivered stellar X- and K-band radar range, equaling the Beltronics STi Magnum at 11.3 miles. But it stumbled somewhat on the widely used 35.5-gigahertz Ka band frequency.
Same thing at the Hill/Curve Test site. Although its X- and K-band scores were excellent, closely trailing the Beltronics STi Magnum's, again it lagged well behind the Beltronics on 35.5 GHz Ka-band. We noticed the same behavior in a later shootout with the Escort Redline.
Scores totaled, the Beltronics STi Magnum edged out the V1. Does that make the Valentine One the world's second-best radar detector? V1 fans are quick to praise its directional arrows, rear antenna and superior laser detection. And they've got a point. Under ideal conditions the directional arrows can pinpoint the direction of an incoming radar beam. And the rear antenna allows the V1 to detect radar coming from behind nearly as well as from ahead. It's also the best in the business at detecting lasers. Some may feel these strengths help to offset its shortcomings.
Radar coming from behind, though, isn't a major threat. And even without a rear-facing antenna, the Beltronics STi Magnum and Escort Redline can detect radar in back from one mile away or more. While it's true that detecting lasers can occasionally be helpful, the only laser defense remains the laser jammer.
Clearly the Valentine One can still keep its newer competitors within sight. But advances in technology denied it top ranking in this test.
- Superb radar range
- Extensive features
- Magnesium housing
- Undetectable by RDDs
- Not immune to false alarms
The Beltronics STi Magnum uses its dual radar antennas to improve performance. The BEL is also one of only four immune to radar detector detectors like the Australian-made Spectre RDD.
Like the Valentine One, the Beltronics STi Magnum is a non-GPS design, but it's compatible with Escort Live. The system includes built-in Bluetooth that links the detector to either an iPhone or Android smartphone loaded with the free Escort Live app. Once the two have been paired, the phone adds the benefits of GPS to the Beltronics STi Magnum, cutting false alarms while warning of red light cameras and speed traps.
The Beltronics STi Magnum excelled at ferreting out distant radar. It spotted all five of our radar guns from over 11.25 miles away, at the time the best-ever performance from a radar detector. [Since eclipsed by the Beltronics's corporate cousin, the Escort RedlineXR.]
On Ka band, by far the most critical radar frequency, the Beltronics STi Magnum outperformed the Valentine One. It also eclipsed the V1 in user-friendliness and ease of operation. And unlike the Valentine One, the Beltronics STi Magnum has self-test diagnostics to protect against overheating.
An Overheating Issue?
We were curious about the cause of the V1's mid-test failure. Both contestants have a magnesium case; we wondered if thermal buildup somehow caused our first V1 to overheat.
To find out, we placed two of each model detector on the dash of an Audi A4 and left them running. With windows up and engine off, we checked temperatures at 20-minute intervals using a digital pyrometer. Ambient temperatures during testing ranged from a balmy 78 degrees to 93 degrees Fahrenheit.
We were surprised by the results. Neither Valentine One indicated a problem, although both had reached 153° F within 58 minutes. At the 62-minute mark our first Beltronics STi Magnum hit 154° F. Then it displayed a "Service Required" warning and shut down to protect itself. The other Beltronics STi Magnum followed suit 18 minutes later, its metal case having reached 163° F.
Test complete, we started the Audi and ran its A/C until the interior again was at room temperature. But one V1 remained dead on K band, the other on both X and K bands. Each required factory repair, taking them out of service for two weeks. We were disappointed at the Valentine One's lack of diagnostic software to warn of these silent failures.
In contrast, after an eight-minute cooling-off period both Beltronics STi Magnums resumed normal operation and began detecting our radar guns again.